20747139

素因数分解:

$3^1\times 7^2\times {\mathrm{113}}^1\times {\mathrm{1249}}^1$

素因数の和:1379

約数の個数: 24

約数和(自身を含む): 32490000

約数和(自身を除く): 11742861

約数列:

[1, 3, 7, 21, 49, 113, 147, 339, 791, 1249, 2373, 3747, 5537, 8743, 16611, 26229, 61201, 141137, 183603, 423411, 987959, 2963877, 6915713, 20747139]

約数ペア:

[(1, 20747139), (3, 6915713), (7, 2963877), (21, 987959), (49, 423411), (113, 183603), (147, 141137), (339, 61201), (791, 26229), (1249, 16611), (2373, 8743), (3747, 5537)]