205475420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{144701}}^1$

素因数の和:144781

約数の個数: 24

約数和(自身を含む): 437578848

約数和(自身を除く): 232103428

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 144701, 289402, 578804, 723505, 1447010, 2894020, 10273771, 20547542, 41095084, 51368855, 102737710, 205475420]

約数ペア:

[(1, 205475420), (2, 102737710), (4, 51368855), (5, 41095084), (10, 20547542), (20, 10273771), (71, 2894020), (142, 1447010), (284, 723505), (355, 578804), (710, 289402), (1420, 144701)]