78396400

素因数分解:

$2^4\times 5^2\times {\mathrm{195991}}^1$

素因数の和:196009

約数の個数: 30

約数和(自身を含む): 188348312

約数和(自身を除く): 109951912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 195991, 391982, 783964, 979955, 1567928, 1959910, 3135856, 3919820, 4899775, 7839640, 9799550, 15679280, 19599100, 39198200, 78396400]

約数ペア:

[(1, 78396400), (2, 39198200), (4, 19599100), (5, 15679280), (8, 9799550), (10, 7839640), (16, 4899775), (20, 3919820), (25, 3135856), (40, 1959910), (50, 1567928), (80, 979955), (100, 783964), (200, 391982), (400, 195991)]