20403980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14369}}^1$

素因数の和:14449

約数の個数: 24

約数和(自身を含む): 43454880

約数和(自身を除く): 23050900

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14369, 28738, 57476, 71845, 143690, 287380, 1020199, 2040398, 4080796, 5100995, 10201990, 20403980]

約数ペア:

[(1, 20403980), (2, 10201990), (4, 5100995), (5, 4080796), (10, 2040398), (20, 1020199), (71, 287380), (142, 143690), (284, 71845), (355, 57476), (710, 28738), (1420, 14369)]