389919220

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{274591}}^1$

素因数の和:274671

約数の個数: 24

約数和(自身を含む): 830366208

約数和(自身を除く): 440446988

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 274591, 549182, 1098364, 1372955, 2745910, 5491820, 19495961, 38991922, 77983844, 97479805, 194959610, 389919220]

約数ペア:

[(1, 389919220), (2, 194959610), (4, 97479805), (5, 77983844), (10, 38991922), (20, 19495961), (71, 5491820), (142, 2745910), (284, 1372955), (355, 1098364), (710, 549182), (1420, 274591)]