21491780

素因数分解:

$2^2\times 5^1\times {\mathrm{613}}^1\times {\mathrm{1753}}^1$

素因数の和:2375

約数の個数: 24

約数和(自身を含む): 45232152

約数和(自身を除く): 23740372

約数列:

[1, 2, 4, 5, 10, 20, 613, 1226, 1753, 2452, 3065, 3506, 6130, 7012, 8765, 12260, 17530, 35060, 1074589, 2149178, 4298356, 5372945, 10745890, 21491780]

約数ペア:

[(1, 21491780), (2, 10745890), (4, 5372945), (5, 4298356), (10, 2149178), (20, 1074589), (613, 35060), (1226, 17530), (1753, 12260), (2452, 8765), (3065, 7012), (3506, 6130)]