21386620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15061}}^1$

素因数の和:15141

約数の個数: 24

約数和(自身を含む): 45547488

約数和(自身を除く): 24160868

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15061, 30122, 60244, 75305, 150610, 301220, 1069331, 2138662, 4277324, 5346655, 10693310, 21386620]

約数ペア:

[(1, 21386620), (2, 10693310), (4, 5346655), (5, 4277324), (10, 2138662), (20, 1069331), (71, 301220), (142, 150610), (284, 75305), (355, 60244), (710, 30122), (1420, 15061)]