87081880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1\times {\mathrm{257}}^1$

素因数の和:508

約数の個数: 64

約数和(自身を含む): 202292640

約数和(自身を除く): 115210760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 197, 215, 257, 344, 394, 430, 514, 788, 860, 985, 1028, 1285, 1576, 1720, 1970, 2056, 2570, 3940, 5140, 7880, 8471, 10280, 11051, 16942, 22102, 33884, 42355, 44204, 50629, 55255, 67768, 84710, 88408, 101258, 110510, 169420, 202516, 221020, 253145, 338840, 405032, 442040, 506290, 1012580, 2025160, 2177047, 4354094, 8708188, 10885235, 17416376, 21770470, 43540940, 87081880]

約数ペア:

[(1, 87081880), (2, 43540940), (4, 21770470), (5, 17416376), (8, 10885235), (10, 8708188), (20, 4354094), (40, 2177047), (43, 2025160), (86, 1012580), (172, 506290), (197, 442040), (215, 405032), (257, 338840), (344, 253145), (394, 221020), (430, 202516), (514, 169420), (788, 110510), (860, 101258), (985, 88408), (1028, 84710), (1285, 67768), (1576, 55255), (1720, 50629), (1970, 44204), (2056, 42355), (2570, 33884), (3940, 22102), (5140, 16942), (7880, 11051), (8471, 10280)]