289640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{557}}^1$

素因数の和:581

約数の個数: 32

約数和(自身を含む): 703080

約数和(自身を除く): 413440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 557, 1114, 2228, 2785, 4456, 5570, 7241, 11140, 14482, 22280, 28964, 36205, 57928, 72410, 144820, 289640]

約数ペア:

[(1, 289640), (2, 144820), (4, 72410), (5, 57928), (8, 36205), (10, 28964), (13, 22280), (20, 14482), (26, 11140), (40, 7241), (52, 5570), (65, 4456), (104, 2785), (130, 2228), (260, 1114), (520, 557)]