21053240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40487}}^1$

素因数の和:40511

約数の個数: 32

約数和(自身を含む): 51014880

約数和(自身を除く): 29961640

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40487, 80974, 161948, 202435, 323896, 404870, 526331, 809740, 1052662, 1619480, 2105324, 2631655, 4210648, 5263310, 10526620, 21053240]

約数ペア:

[(1, 21053240), (2, 10526620), (4, 5263310), (5, 4210648), (8, 2631655), (10, 2105324), (13, 1619480), (20, 1052662), (26, 809740), (40, 526331), (52, 404870), (65, 323896), (104, 202435), (130, 161948), (260, 80974), (520, 40487)]