21391920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:140

約数の個数: 240

約数和(自身を含む): 81592992

約数和(自身を除く): 60201072

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 37, 40, 44, 45, 48, 55, 60, 66, 72, 73, 74, 80, 88, 90, 99, 110, 111, 120, 132, 144, 146, 148, 165, 176, 180, 185, 198, 219, 220, 222, 240, 264, 292, 296, 330, 333, 360, 365, 370, 396, 407, 438, 440, 444, 495, 528, 555, 584, 592, 657, 660, 666, 720, 730, 740, 792, 803, 814, 876, 880, 888, 990, 1095, 1110, 1168, 1221, 1314, 1320, 1332, 1460, 1480, 1584, 1606, 1628, 1665, 1752, 1776, 1980, 2035, 2190, 2220, 2409, 2442, 2628, 2640, 2664, 2701, 2920, 2960, 3212, 3256, 3285, 3330, 3504, 3663, 3960, 4015, 4070, 4380, 4440, 4818, 4884, 5256, 5328, 5402, 5840, 6105, 6424, 6512, 6570, 6660, 7227, 7326, 7920, 8030, 8103, 8140, 8760, 8880, 9636, 9768, 10512, 10804, 12045, 12210, 12848, 13140, 13320, 13505, 14454, 14652, 16060, 16206, 16280, 17520, 18315, 19272, 19536, 21608, 24090, 24309, 24420, 26280, 26640, 27010, 28908, 29304, 29711, 32120, 32412, 32560, 36135, 36630, 38544, 40515, 43216, 48180, 48618, 48840, 52560, 54020, 57816, 58608, 59422, 64240, 64824, 72270, 73260, 81030, 89133, 96360, 97236, 97680, 108040, 115632, 118844, 121545, 129648, 144540, 146520, 148555, 162060, 178266, 192720, 194472, 216080, 237688, 243090, 267399, 289080, 293040, 297110, 324120, 356532, 388944, 445665, 475376, 486180, 534798, 578160, 594220, 648240, 713064, 891330, 972360, 1069596, 1188440, 1336995, 1426128, 1782660, 1944720, 2139192, 2376880, 2673990, 3565320, 4278384, 5347980, 7130640, 10695960, 21391920]

約数ペア:

[(1, 21391920), (2, 10695960), (3, 7130640), (4, 5347980), (5, 4278384), (6, 3565320), (8, 2673990), (9, 2376880), (10, 2139192), (11, 1944720), (12, 1782660), (15, 1426128), (16, 1336995), (18, 1188440), (20, 1069596), (22, 972360), (24, 891330), (30, 713064), (33, 648240), (36, 594220), (37, 578160), (40, 534798), (44, 486180), (45, 475376), (48, 445665), (55, 388944), (60, 356532), (66, 324120), (72, 297110), (73, 293040), (74, 289080), (80, 267399), (88, 243090), (90, 237688), (99, 216080), (110, 194472), (111, 192720), (120, 178266), (132, 162060), (144, 148555), (146, 146520), (148, 144540), (165, 129648), (176, 121545), (180, 118844), (185, 115632), (198, 108040), (219, 97680), (220, 97236), (222, 96360), (240, 89133), (264, 81030), (292, 73260), (296, 72270), (330, 64824), (333, 64240), (360, 59422), (365, 58608), (370, 57816), (396, 54020), (407, 52560), (438, 48840), (440, 48618), (444, 48180), (495, 43216), (528, 40515), (555, 38544), (584, 36630), (592, 36135), (657, 32560), (660, 32412), (666, 32120), (720, 29711), (730, 29304), (740, 28908), (792, 27010), (803, 26640), (814, 26280), (876, 24420), (880, 24309), (888, 24090), (990, 21608), (1095, 19536), (1110, 19272), (1168, 18315), (1221, 17520), (1314, 16280), (1320, 16206), (1332, 16060), (1460, 14652), (1480, 14454), (1584, 13505), (1606, 13320), (1628, 13140), (1665, 12848), (1752, 12210), (1776, 12045), (1980, 10804), (2035, 10512), (2190, 9768), (2220, 9636), (2409, 8880), (2442, 8760), (2628, 8140), (2640, 8103), (2664, 8030), (2701, 7920), (2920, 7326), (2960, 7227), (3212, 6660), (3256, 6570), (3285, 6512), (3330, 6424), (3504, 6105), (3663, 5840), (3960, 5402), (4015, 5328), (4070, 5256), (4380, 4884), (4440, 4818)]