21054930

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53987}}^1$

素因数の和:54010

約数の個数: 32

約数和(自身を含む): 54419904

約数和(自身を除く): 33364974

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 53987, 107974, 161961, 269935, 323922, 539870, 701831, 809805, 1403662, 1619610, 2105493, 3509155, 4210986, 7018310, 10527465, 21054930]

約数ペア:

[(1, 21054930), (2, 10527465), (3, 7018310), (5, 4210986), (6, 3509155), (10, 2105493), (13, 1619610), (15, 1403662), (26, 809805), (30, 701831), (39, 539870), (65, 323922), (78, 269935), (130, 161961), (195, 107974), (390, 53987)]