21985510

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{70921}}^1$

素因数の和:70959

約数の個数: 16

約数和(自身を含む): 40851072

約数和(自身を除く): 18865562

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 70921, 141842, 354605, 709210, 2198551, 4397102, 10992755, 21985510]

約数ペア:

[(1, 21985510), (2, 10992755), (5, 4397102), (10, 2198551), (31, 709210), (62, 354605), (155, 141842), (310, 70921)]