20638735

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{2131}}^1$

素因数の和:2298

約数の個数: 16

約数和(自身を含む): 26863200

約数和(自身を除く): 6224465

約数列:

[1, 5, 13, 65, 149, 745, 1937, 2131, 9685, 10655, 27703, 138515, 317519, 1587595, 4127747, 20638735]

約数ペア:

[(1, 20638735), (5, 4127747), (13, 1587595), (65, 317519), (149, 138515), (745, 27703), (1937, 10655), (2131, 9685)]