20391189

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{661}}^1$

素因数の和:797

約数の個数: 32

約数和(自身を含む): 33809664

約数和(自身を除く): 13418475

約数列:

[1, 3, 7, 13, 21, 39, 91, 113, 273, 339, 661, 791, 1469, 1983, 2373, 4407, 4627, 8593, 10283, 13881, 25779, 30849, 60151, 74693, 180453, 224079, 522851, 971009, 1568553, 2913027, 6797063, 20391189]

約数ペア:

[(1, 20391189), (3, 6797063), (7, 2913027), (13, 1568553), (21, 971009), (39, 522851), (91, 224079), (113, 180453), (273, 74693), (339, 60151), (661, 30849), (791, 25779), (1469, 13881), (1983, 10283), (2373, 8593), (4407, 4627)]