201398380

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{20509}}^1$

素因数の和:21009

約数の個数: 24

約数和(自身を含む): 423818640

約数和(自身を除く): 222420260

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2455, 4910, 9820, 20509, 41018, 82036, 102545, 205090, 410180, 10069919, 20139838, 40279676, 50349595, 100699190, 201398380]

約数ペア:

[(1, 201398380), (2, 100699190), (4, 50349595), (5, 40279676), (10, 20139838), (20, 10069919), (491, 410180), (982, 205090), (1964, 102545), (2455, 82036), (4910, 41018), (9820, 20509)]