21490919

素因数分解:

${\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:358

約数の個数: 16

約数和(自身を含む): 23328000

約数和(自身を除く): 1837081

約数列:

[1, 19, 71, 89, 179, 1349, 1691, 3401, 6319, 12709, 15931, 120061, 241471, 302689, 1131101, 21490919]

約数ペア:

[(1, 21490919), (19, 1131101), (71, 302689), (89, 241471), (179, 120061), (1349, 15931), (1691, 12709), (3401, 6319)]