19973915

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{2243}}^1$

素因数の和:2398

約数の個数: 16

約数和(自身を含む): 26012448

約数和(自身を除く): 6038533

約数列:

[1, 5, 13, 65, 137, 685, 1781, 2243, 8905, 11215, 29159, 145795, 307291, 1536455, 3994783, 19973915]

約数ペア:

[(1, 19973915), (5, 3994783), (13, 1536455), (65, 307291), (137, 145795), (685, 29159), (1781, 11215), (2243, 8905)]