20399450

素因数分解:

$2^1\times 5^2\times {\mathrm{163}}^1\times {\mathrm{2503}}^1$

素因数の和:2678

約数の個数: 24

約数和(自身を含む): 38191008

約数和(自身を除く): 17791558

約数列:

[1, 2, 5, 10, 25, 50, 163, 326, 815, 1630, 2503, 4075, 5006, 8150, 12515, 25030, 62575, 125150, 407989, 815978, 2039945, 4079890, 10199725, 20399450]

約数ペア:

[(1, 20399450), (2, 10199725), (5, 4079890), (10, 2039945), (25, 815978), (50, 407989), (163, 125150), (326, 62575), (815, 25030), (1630, 12515), (2503, 8150), (4075, 5006)]