20871260

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{2003}}^1$

素因数の和:2533

約数の個数: 24

約数和(自身を含む): 43935696

約数和(自身を除く): 23064436

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 2003, 2084, 2605, 4006, 5210, 8012, 10015, 10420, 20030, 40060, 1043563, 2087126, 4174252, 5217815, 10435630, 20871260]

約数ペア:

[(1, 20871260), (2, 10435630), (4, 5217815), (5, 4174252), (10, 2087126), (20, 1043563), (521, 40060), (1042, 20030), (2003, 10420), (2084, 10015), (2605, 8012), (4006, 5210)]