21990810

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{2357}}^1$

素因数の和:2678

約数の個数: 32

約数和(自身を含む): 52970112

約数和(自身を除く): 30979302

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 311, 622, 933, 1555, 1866, 2357, 3110, 4665, 4714, 7071, 9330, 11785, 14142, 23570, 35355, 70710, 733027, 1466054, 2199081, 3665135, 4398162, 7330270, 10995405, 21990810]

約数ペア:

[(1, 21990810), (2, 10995405), (3, 7330270), (5, 4398162), (6, 3665135), (10, 2199081), (15, 1466054), (30, 733027), (311, 70710), (622, 35355), (933, 23570), (1555, 14142), (1866, 11785), (2357, 9330), (3110, 7071), (4665, 4714)]