20178518980

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2054839}}^1$

素因数の和:2055339

約数の個数: 24

約数和(自身を含む): 42461213760

約数和(自身を除く): 22282694780

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2455, 4910, 9820, 2054839, 4109678, 8219356, 10274195, 20548390, 41096780, 1008925949, 2017851898, 4035703796, 5044629745, 10089259490, 20178518980]

約数ペア:

[(1, 20178518980), (2, 10089259490), (4, 5044629745), (5, 4035703796), (10, 2017851898), (20, 1008925949), (491, 41096780), (982, 20548390), (1964, 10274195), (2455, 8219356), (4910, 4109678), (9820, 2054839)]