19947850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{30689}}^1$

素因数の和:30714

約数の個数: 24

約数和(自身を含む): 39958380

約数和(自身を除く): 20010530

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 325, 650, 30689, 61378, 153445, 306890, 398957, 767225, 797914, 1534450, 1994785, 3989570, 9973925, 19947850]

約数ペア:

[(1, 19947850), (2, 9973925), (5, 3989570), (10, 1994785), (13, 1534450), (25, 797914), (26, 767225), (50, 398957), (65, 306890), (130, 153445), (325, 61378), (650, 30689)]