20887720

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10657}}^1$

素因数の和:10682

約数の個数: 48

約数和(自身を含む): 54675540

約数和(自身を除く): 33787820

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10657, 21314, 42628, 53285, 74599, 85256, 106570, 149198, 213140, 298396, 372995, 426280, 522193, 596792, 745990, 1044386, 1491980, 2088772, 2610965, 2983960, 4177544, 5221930, 10443860, 20887720]

約数ペア:

[(1, 20887720), (2, 10443860), (4, 5221930), (5, 4177544), (7, 2983960), (8, 2610965), (10, 2088772), (14, 1491980), (20, 1044386), (28, 745990), (35, 596792), (40, 522193), (49, 426280), (56, 372995), (70, 298396), (98, 213140), (140, 149198), (196, 106570), (245, 85256), (280, 74599), (392, 53285), (490, 42628), (980, 21314), (1960, 10657)]