65420840

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{3331}}^1$

素因数の和:3833

約数の個数: 32

約数和(自身を含む): 147540960

約数和(自身を除く): 82120120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2455, 3331, 3928, 4910, 6662, 9820, 13324, 16655, 19640, 26648, 33310, 66620, 133240, 1635521, 3271042, 6542084, 8177605, 13084168, 16355210, 32710420, 65420840]

約数ペア:

[(1, 65420840), (2, 32710420), (4, 16355210), (5, 13084168), (8, 8177605), (10, 6542084), (20, 3271042), (40, 1635521), (491, 133240), (982, 66620), (1964, 33310), (2455, 26648), (3331, 19640), (3928, 16655), (4910, 13324), (6662, 9820)]