21351668

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{21611}}^1$

素因数の和:21647

約数の個数: 24

約数和(自身を含む): 42359520

約数和(自身を除く): 21007852

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988, 21611, 43222, 86444, 280943, 410609, 561886, 821218, 1123772, 1642436, 5337917, 10675834, 21351668]

約数ペア:

[(1, 21351668), (2, 10675834), (4, 5337917), (13, 1642436), (19, 1123772), (26, 821218), (38, 561886), (52, 410609), (76, 280943), (247, 86444), (494, 43222), (988, 21611)]