21639628

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{131}}^1\times {\mathrm{677}}^1$

素因数の和:873

約数の個数: 24

約数和(自身を含む): 38841264

約数和(自身を除く): 17201636

約数列:

[1, 2, 4, 61, 122, 131, 244, 262, 524, 677, 1354, 2708, 7991, 15982, 31964, 41297, 82594, 88687, 165188, 177374, 354748, 5409907, 10819814, 21639628]

約数ペア:

[(1, 21639628), (2, 10819814), (4, 5409907), (61, 354748), (122, 177374), (131, 165188), (244, 88687), (262, 82594), (524, 41297), (677, 31964), (1354, 15982), (2708, 7991)]