21581516

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{571}}^1\times {\mathrm{859}}^1$

素因数の和:1445

約数の個数: 24

約数和(自身を含む): 41321280

約数和(自身を除く): 19739764

約数列:

[1, 2, 4, 11, 22, 44, 571, 859, 1142, 1718, 2284, 3436, 6281, 9449, 12562, 18898, 25124, 37796, 490489, 980978, 1961956, 5395379, 10790758, 21581516]

約数ペア:

[(1, 21581516), (2, 10790758), (4, 5395379), (11, 1961956), (22, 980978), (44, 490489), (571, 37796), (859, 25124), (1142, 18898), (1718, 12562), (2284, 9449), (3436, 6281)]