19940557

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{607}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 25944576

約数和(自身を除く): 6004019

約数列:

[1, 7, 13, 19, 91, 133, 247, 361, 607, 1729, 2527, 4249, 4693, 7891, 11533, 32851, 55237, 80731, 149929, 219127, 1049503, 1533889, 2848651, 19940557]

約数ペア:

[(1, 19940557), (7, 2848651), (13, 1533889), (19, 1049503), (91, 219127), (133, 149929), (247, 80731), (361, 55237), (607, 32851), (1729, 11533), (2527, 7891), (4249, 4693)]