21156460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81371}}^1$

素因数の和:81393

約数の個数: 24

約数和(自身を含む): 47846736

約数和(自身を除く): 26690276

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81371, 162742, 325484, 406855, 813710, 1057823, 1627420, 2115646, 4231292, 5289115, 10578230, 21156460]

約数ペア:

[(1, 21156460), (2, 10578230), (4, 5289115), (5, 4231292), (10, 2115646), (13, 1627420), (20, 1057823), (26, 813710), (52, 406855), (65, 325484), (130, 162742), (260, 81371)]