21807020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25357}}^1$

素因数の和:25409

約数の個数: 24

約数和(自身を含む): 46861584

約数和(自身を除く): 25054564

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25357, 50714, 101428, 126785, 253570, 507140, 1090351, 2180702, 4361404, 5451755, 10903510, 21807020]

約数ペア:

[(1, 21807020), (2, 10903510), (4, 5451755), (5, 4361404), (10, 2180702), (20, 1090351), (43, 507140), (86, 253570), (172, 126785), (215, 101428), (430, 50714), (860, 25357)]