2018421880

素因数分解:

$2^3\times 5^1\times {\mathrm{2531}}^1\times {\mathrm{19937}}^1$

素因数の和:22479

約数の個数: 32

約数和(自身を含む): 4543471440

約数和(自身を除く): 2525049560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2531, 5062, 10124, 12655, 19937, 20248, 25310, 39874, 50620, 79748, 99685, 101240, 159496, 199370, 398740, 797480, 50460547, 100921094, 201842188, 252302735, 403684376, 504605470, 1009210940, 2018421880]

約数ペア:

[(1, 2018421880), (2, 1009210940), (4, 504605470), (5, 403684376), (8, 252302735), (10, 201842188), (20, 100921094), (40, 50460547), (2531, 797480), (5062, 398740), (10124, 199370), (12655, 159496), (19937, 101240), (20248, 99685), (25310, 79748), (39874, 50620)]