19717257

素因数分解:

$3^1\times 7^2\times {\mathrm{113}}^1\times {\mathrm{1187}}^1$

素因数の和:1317

約数の個数: 24

約数和(自身を含む): 30878496

約数和(自身を除く): 11161239

約数列:

[1, 3, 7, 21, 49, 113, 147, 339, 791, 1187, 2373, 3561, 5537, 8309, 16611, 24927, 58163, 134131, 174489, 402393, 938917, 2816751, 6572419, 19717257]

約数ペア:

[(1, 19717257), (3, 6572419), (7, 2816751), (21, 938917), (49, 402393), (113, 174489), (147, 134131), (339, 58163), (791, 24927), (1187, 16611), (2373, 8309), (3561, 5537)]