204438820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{143971}}^1$

素因数の和:144051

約数の個数: 24

約数和(自身を含む): 435371328

約数和(自身を除く): 230932508

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 143971, 287942, 575884, 719855, 1439710, 2879420, 10221941, 20443882, 40887764, 51109705, 102219410, 204438820]

約数ペア:

[(1, 204438820), (2, 102219410), (4, 51109705), (5, 40887764), (10, 20443882), (20, 10221941), (71, 2879420), (142, 1439710), (284, 719855), (355, 575884), (710, 287942), (1420, 143971)]