20704990

素因数分解:

$2^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1\times {\mathrm{251}}^1$

素因数の和:444

約数の個数: 32

約数和(自身を含む): 38265696

約数和(自身を除く): 17560706

約数列:

[1, 2, 5, 10, 73, 113, 146, 226, 251, 365, 502, 565, 730, 1130, 1255, 2510, 8249, 16498, 18323, 28363, 36646, 41245, 56726, 82490, 91615, 141815, 183230, 283630, 2070499, 4140998, 10352495, 20704990]

約数ペア:

[(1, 20704990), (2, 10352495), (5, 4140998), (10, 2070499), (73, 283630), (113, 183230), (146, 141815), (226, 91615), (251, 82490), (365, 56726), (502, 41245), (565, 36646), (730, 28363), (1130, 18323), (1255, 16498), (2510, 8249)]