21690417

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{14149}}^1$

素因数の和:14232

約数の個数: 16

約数和(自身を含む): 33507200

約数和(自身を除く): 11816783

約数列:

[1, 3, 7, 21, 73, 219, 511, 1533, 14149, 42447, 99043, 297129, 1032877, 3098631, 7230139, 21690417]

約数ペア:

[(1, 21690417), (3, 7230139), (7, 3098631), (21, 1032877), (73, 297129), (219, 99043), (511, 42447), (1533, 14149)]