21500560

素因数分解:

$2^4\times 5^1\times {\mathrm{268757}}^1$

素因数の和:268770

約数の個数: 20

約数和(自身を含む): 49988988

約数和(自身を除く): 28488428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268757, 537514, 1075028, 1343785, 2150056, 2687570, 4300112, 5375140, 10750280, 21500560]

約数ペア:

[(1, 21500560), (2, 10750280), (4, 5375140), (5, 4300112), (8, 2687570), (10, 2150056), (16, 1343785), (20, 1075028), (40, 537514), (80, 268757)]