71808280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{503}}^1$

素因数の和:640

約数の個数: 64

約数和(自身を含む): 167650560

約数和(自身を除く): 95842280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 83, 86, 166, 172, 215, 332, 344, 415, 430, 503, 664, 830, 860, 1006, 1660, 1720, 2012, 2515, 3320, 3569, 4024, 5030, 7138, 10060, 14276, 17845, 20120, 21629, 28552, 35690, 41749, 43258, 71380, 83498, 86516, 108145, 142760, 166996, 173032, 208745, 216290, 333992, 417490, 432580, 834980, 865160, 1669960, 1795207, 3590414, 7180828, 8976035, 14361656, 17952070, 35904140, 71808280]

約数ペア:

[(1, 71808280), (2, 35904140), (4, 17952070), (5, 14361656), (8, 8976035), (10, 7180828), (20, 3590414), (40, 1795207), (43, 1669960), (83, 865160), (86, 834980), (166, 432580), (172, 417490), (215, 333992), (332, 216290), (344, 208745), (415, 173032), (430, 166996), (503, 142760), (664, 108145), (830, 86516), (860, 83498), (1006, 71380), (1660, 43258), (1720, 41749), (2012, 35690), (2515, 28552), (3320, 21629), (3569, 20120), (4024, 17845), (5030, 14276), (7138, 10060)]