644765440

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:247

約数の個数: 216

約数和(自身を含む): 1781174304

約数和(自身を除く): 1136408864

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 32, 40, 44, 46, 55, 64, 80, 88, 92, 110, 115, 121, 128, 160, 176, 181, 184, 220, 230, 242, 253, 256, 320, 352, 362, 368, 440, 460, 484, 506, 605, 640, 704, 724, 736, 880, 905, 920, 968, 1012, 1210, 1265, 1280, 1408, 1448, 1472, 1760, 1810, 1840, 1936, 1991, 2024, 2420, 2530, 2783, 2816, 2896, 2944, 3520, 3620, 3680, 3872, 3982, 4048, 4163, 4840, 5060, 5566, 5792, 5888, 7040, 7240, 7360, 7744, 7964, 8096, 8326, 9680, 9955, 10120, 11132, 11584, 13915, 14080, 14480, 14720, 15488, 15928, 16192, 16652, 19360, 19910, 20240, 20815, 21901, 22264, 23168, 27830, 28960, 29440, 30976, 31856, 32384, 33304, 38720, 39820, 40480, 41630, 43802, 44528, 45793, 46336, 55660, 57920, 63712, 64768, 66608, 77440, 79640, 80960, 83260, 87604, 89056, 91586, 109505, 111320, 115840, 127424, 133216, 154880, 159280, 161920, 166520, 175208, 178112, 183172, 219010, 222640, 228965, 231680, 254848, 266432, 318560, 323840, 333040, 350416, 356224, 366344, 438020, 445280, 457930, 503723, 509696, 532864, 637120, 666080, 700832, 712448, 732688, 876040, 890560, 915860, 1007446, 1065728, 1274240, 1332160, 1401664, 1465376, 1752080, 1781120, 1831720, 2014892, 2518615, 2548480, 2664320, 2803328, 2930752, 3504160, 3562240, 3663440, 4029784, 5037230, 5328640, 5606656, 5861504, 7008320, 7326880, 8059568, 10074460, 11723008, 14016640, 14653760, 16119136, 20148920, 28033280, 29307520, 32238272, 40297840, 58615040, 64476544, 80595680, 128953088, 161191360, 322382720, 644765440]

約数ペア:

[(1, 644765440), (2, 322382720), (4, 161191360), (5, 128953088), (8, 80595680), (10, 64476544), (11, 58615040), (16, 40297840), (20, 32238272), (22, 29307520), (23, 28033280), (32, 20148920), (40, 16119136), (44, 14653760), (46, 14016640), (55, 11723008), (64, 10074460), (80, 8059568), (88, 7326880), (92, 7008320), (110, 5861504), (115, 5606656), (121, 5328640), (128, 5037230), (160, 4029784), (176, 3663440), (181, 3562240), (184, 3504160), (220, 2930752), (230, 2803328), (242, 2664320), (253, 2548480), (256, 2518615), (320, 2014892), (352, 1831720), (362, 1781120), (368, 1752080), (440, 1465376), (460, 1401664), (484, 1332160), (506, 1274240), (605, 1065728), (640, 1007446), (704, 915860), (724, 890560), (736, 876040), (880, 732688), (905, 712448), (920, 700832), (968, 666080), (1012, 637120), (1210, 532864), (1265, 509696), (1280, 503723), (1408, 457930), (1448, 445280), (1472, 438020), (1760, 366344), (1810, 356224), (1840, 350416), (1936, 333040), (1991, 323840), (2024, 318560), (2420, 266432), (2530, 254848), (2783, 231680), (2816, 228965), (2896, 222640), (2944, 219010), (3520, 183172), (3620, 178112), (3680, 175208), (3872, 166520), (3982, 161920), (4048, 159280), (4163, 154880), (4840, 133216), (5060, 127424), (5566, 115840), (5792, 111320), (5888, 109505), (7040, 91586), (7240, 89056), (7360, 87604), (7744, 83260), (7964, 80960), (8096, 79640), (8326, 77440), (9680, 66608), (9955, 64768), (10120, 63712), (11132, 57920), (11584, 55660), (13915, 46336), (14080, 45793), (14480, 44528), (14720, 43802), (15488, 41630), (15928, 40480), (16192, 39820), (16652, 38720), (19360, 33304), (19910, 32384), (20240, 31856), (20815, 30976), (21901, 29440), (22264, 28960), (23168, 27830)]