21604919

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{2663}}^1$

素因数の和:2750

約数の個数: 16

約数和(自身を含む): 26426880

約数和(自身を除く): 4821961

約数列:

[1, 7, 19, 61, 133, 427, 1159, 2663, 8113, 18641, 50597, 162443, 354179, 1137101, 3086417, 21604919]

約数ペア:

[(1, 21604919), (7, 3086417), (19, 1137101), (61, 354179), (133, 162443), (427, 50597), (1159, 18641), (2663, 8113)]