20886890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{521}}^1$

素因数の和:758

約数の個数: 32

約数和(自身を含む): 39839040

約数和(自身を除く): 18952150

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 211, 422, 521, 1042, 1055, 2110, 2605, 4009, 5210, 8018, 9899, 19798, 20045, 40090, 49495, 98990, 109931, 219862, 549655, 1099310, 2088689, 4177378, 10443445, 20886890]

約数ペア:

[(1, 20886890), (2, 10443445), (5, 4177378), (10, 2088689), (19, 1099310), (38, 549655), (95, 219862), (190, 109931), (211, 98990), (422, 49495), (521, 40090), (1042, 20045), (1055, 19798), (2110, 9899), (2605, 8018), (4009, 5210)]