19121980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{50321}}^1$

素因数の和:50349

約数の個数: 24

約数和(自身を含む): 42270480

約数和(自身を除く): 23148500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 50321, 100642, 201284, 251605, 503210, 956099, 1006420, 1912198, 3824396, 4780495, 9560990, 19121980]

約数ペア:

[(1, 19121980), (2, 9560990), (4, 4780495), (5, 3824396), (10, 1912198), (19, 1006420), (20, 956099), (38, 503210), (76, 251605), (95, 201284), (190, 100642), (380, 50321)]