21286876

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{419}}^1\times {\mathrm{977}}^1$

素因数の和:1413

約数の個数: 24

約数和(自身を含む): 40254480

約数和(自身を除く): 18967604

約数列:

[1, 2, 4, 13, 26, 52, 419, 838, 977, 1676, 1954, 3908, 5447, 10894, 12701, 21788, 25402, 50804, 409363, 818726, 1637452, 5321719, 10643438, 21286876]

約数ペア:

[(1, 21286876), (2, 10643438), (4, 5321719), (13, 1637452), (26, 818726), (52, 409363), (419, 50804), (838, 25402), (977, 21788), (1676, 12701), (1954, 10894), (3908, 5447)]