21687818

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{10457}}^1$

素因数の和:10537

約数の個数: 16

約数和(自身を含む): 35013384

約数和(自身を除く): 13325566

約数列:

[1, 2, 17, 34, 61, 122, 1037, 2074, 10457, 20914, 177769, 355538, 637877, 1275754, 10843909, 21687818]

約数ペア:

[(1, 21687818), (2, 10843909), (17, 1275754), (34, 637877), (61, 355538), (122, 177769), (1037, 20914), (2074, 10457)]