21528620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15161}}^1$

素因数の和:15241

約数の個数: 24

約数和(自身を含む): 45849888

約数和(自身を除く): 24321268

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15161, 30322, 60644, 75805, 151610, 303220, 1076431, 2152862, 4305724, 5382155, 10764310, 21528620]

約数ペア:

[(1, 21528620), (2, 10764310), (4, 5382155), (5, 4305724), (10, 2152862), (20, 1076431), (71, 303220), (142, 151610), (284, 75805), (355, 60644), (710, 30322), (1420, 15161)]