640747520

素因数分解:

$2^{11}\times 5^1\times 7^2\times {\mathrm{1277}}^1$

素因数の和:1318

約数の個数: 144

約数和(自身を含む): 1789826220

約数和(自身を除く): 1149078700

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 256, 280, 320, 392, 448, 490, 512, 560, 640, 784, 896, 980, 1024, 1120, 1277, 1280, 1568, 1792, 1960, 2048, 2240, 2554, 2560, 3136, 3584, 3920, 4480, 5108, 5120, 6272, 6385, 7168, 7840, 8939, 8960, 10216, 10240, 12544, 12770, 14336, 15680, 17878, 17920, 20432, 25088, 25540, 31360, 35756, 35840, 40864, 44695, 50176, 51080, 62573, 62720, 71512, 71680, 81728, 89390, 100352, 102160, 125146, 125440, 143024, 163456, 178780, 204320, 250292, 250880, 286048, 312865, 326912, 357560, 408640, 500584, 501760, 572096, 625730, 653824, 715120, 817280, 1001168, 1144192, 1251460, 1307648, 1430240, 1634560, 2002336, 2288384, 2502920, 2615296, 2860480, 3269120, 4004672, 4576768, 5005840, 5720960, 6538240, 8009344, 9153536, 10011680, 11441920, 13076480, 16018688, 18307072, 20023360, 22883840, 32037376, 40046720, 45767680, 64074752, 80093440, 91535360, 128149504, 160186880, 320373760, 640747520]

約数ペア:

[(1, 640747520), (2, 320373760), (4, 160186880), (5, 128149504), (7, 91535360), (8, 80093440), (10, 64074752), (14, 45767680), (16, 40046720), (20, 32037376), (28, 22883840), (32, 20023360), (35, 18307072), (40, 16018688), (49, 13076480), (56, 11441920), (64, 10011680), (70, 9153536), (80, 8009344), (98, 6538240), (112, 5720960), (128, 5005840), (140, 4576768), (160, 4004672), (196, 3269120), (224, 2860480), (245, 2615296), (256, 2502920), (280, 2288384), (320, 2002336), (392, 1634560), (448, 1430240), (490, 1307648), (512, 1251460), (560, 1144192), (640, 1001168), (784, 817280), (896, 715120), (980, 653824), (1024, 625730), (1120, 572096), (1277, 501760), (1280, 500584), (1568, 408640), (1792, 357560), (1960, 326912), (2048, 312865), (2240, 286048), (2554, 250880), (2560, 250292), (3136, 204320), (3584, 178780), (3920, 163456), (4480, 143024), (5108, 125440), (5120, 125146), (6272, 102160), (6385, 100352), (7168, 89390), (7840, 81728), (8939, 71680), (8960, 71512), (10216, 62720), (10240, 62573), (12544, 51080), (12770, 50176), (14336, 44695), (15680, 40864), (17878, 35840), (17920, 35756), (20432, 31360), (25088, 25540)]