21180908

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12401}}^1$

素因数の和:12473

約数の個数: 24

約数和(自身を含む): 43059744

約数和(自身を除く): 21878836

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12401, 24802, 49604, 86807, 173614, 347228, 756461, 1512922, 3025844, 5295227, 10590454, 21180908]

約数ペア:

[(1, 21180908), (2, 10590454), (4, 5295227), (7, 3025844), (14, 1512922), (28, 756461), (61, 347228), (122, 173614), (244, 86807), (427, 49604), (854, 24802), (1708, 12401)]