4020080

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1621}}^1$

素因数の和:1665

約数の個数: 40

約数和(自身を含む): 9654144

約数和(自身を除く): 5634064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 1621, 2480, 3242, 6484, 8105, 12968, 16210, 25936, 32420, 50251, 64840, 100502, 129680, 201004, 251255, 402008, 502510, 804016, 1005020, 2010040, 4020080]

約数ペア:

[(1, 4020080), (2, 2010040), (4, 1005020), (5, 804016), (8, 502510), (10, 402008), (16, 251255), (20, 201004), (31, 129680), (40, 100502), (62, 64840), (80, 50251), (124, 32420), (155, 25936), (248, 16210), (310, 12968), (496, 8105), (620, 6484), (1240, 3242), (1621, 2480)]