20172497980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1234547}}^1$

素因数の和:1234618

約数の個数: 48

約数和(自身を含む): 45628894080

約数和(自身を除く): 25456396100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1634, 3268, 4085, 8170, 16340, 1234547, 2469094, 4938188, 6172735, 12345470, 23456393, 24690940, 46912786, 53085521, 93825572, 106171042, 117281965, 212342084, 234563930, 265427605, 469127860, 530855210, 1008624899, 1061710420, 2017249798, 4034499596, 5043124495, 10086248990, 20172497980]

約数ペア:

[(1, 20172497980), (2, 10086248990), (4, 5043124495), (5, 4034499596), (10, 2017249798), (19, 1061710420), (20, 1008624899), (38, 530855210), (43, 469127860), (76, 265427605), (86, 234563930), (95, 212342084), (172, 117281965), (190, 106171042), (215, 93825572), (380, 53085521), (430, 46912786), (817, 24690940), (860, 23456393), (1634, 12345470), (3268, 6172735), (4085, 4938188), (8170, 2469094), (16340, 1234547)]