390800

素因数分解:

$2^4\times 5^2\times {\mathrm{977}}^1$

素因数の和:995

約数の個数: 30

約数和(自身を含む): 939858

約数和(自身を除く): 549058

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 977, 1954, 3908, 4885, 7816, 9770, 15632, 19540, 24425, 39080, 48850, 78160, 97700, 195400, 390800]

約数ペア:

[(1, 390800), (2, 195400), (4, 97700), (5, 78160), (8, 48850), (10, 39080), (16, 24425), (20, 19540), (25, 15632), (40, 9770), (50, 7816), (80, 4885), (100, 3908), (200, 1954), (400, 977)]