21890570

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12953}}^1$

素因数の和:12986

約数の個数: 24

約数和(自身を含む): 42670476

約数和(自身を除く): 20779906

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12953, 25906, 64765, 129530, 168389, 336778, 841945, 1683890, 2189057, 4378114, 10945285, 21890570]

約数ペア:

[(1, 21890570), (2, 10945285), (5, 4378114), (10, 2189057), (13, 1683890), (26, 841945), (65, 336778), (130, 168389), (169, 129530), (338, 64765), (845, 25906), (1690, 12953)]