51999740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199999}}^1$

素因数の和:200021

約数の個数: 24

約数和(自身を含む): 117600000

約数和(自身を除く): 65600260

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 199999, 399998, 799996, 999995, 1999990, 2599987, 3999980, 5199974, 10399948, 12999935, 25999870, 51999740]

約数ペア:

[(1, 51999740), (2, 25999870), (4, 12999935), (5, 10399948), (10, 5199974), (13, 3999980), (20, 2599987), (26, 1999990), (52, 999995), (65, 799996), (130, 399998), (260, 199999)]