21491995

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{881}}^1$

素因数の和:951

約数の個数: 32

約数和(自身を含む): 32006016

約数和(自身を除く): 10514021

約数列:

[1, 5, 7, 17, 35, 41, 85, 119, 205, 287, 595, 697, 881, 1435, 3485, 4405, 4879, 6167, 14977, 24395, 30835, 36121, 74885, 104839, 180605, 252847, 524195, 614057, 1264235, 3070285, 4298399, 21491995]

約数ペア:

[(1, 21491995), (5, 4298399), (7, 3070285), (17, 1264235), (35, 614057), (41, 524195), (85, 252847), (119, 180605), (205, 104839), (287, 74885), (595, 36121), (697, 30835), (881, 24395), (1435, 14977), (3485, 6167), (4405, 4879)]