21015990

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{281}}^1$

素因数の和:574

約数の個数: 64

約数和(自身を含む): 56445120

約数和(自身を除く): 35429130

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 270, 277, 281, 554, 562, 831, 843, 1385, 1405, 1662, 1686, 2493, 2529, 2770, 2810, 4155, 4215, 4986, 5058, 7479, 7587, 8310, 8430, 12465, 12645, 14958, 15174, 24930, 25290, 37395, 37935, 74790, 75870, 77837, 155674, 233511, 389185, 467022, 700533, 778370, 1167555, 1401066, 2101599, 2335110, 3502665, 4203198, 7005330, 10507995, 21015990]

約数ペア:

[(1, 21015990), (2, 10507995), (3, 7005330), (5, 4203198), (6, 3502665), (9, 2335110), (10, 2101599), (15, 1401066), (18, 1167555), (27, 778370), (30, 700533), (45, 467022), (54, 389185), (90, 233511), (135, 155674), (270, 77837), (277, 75870), (281, 74790), (554, 37935), (562, 37395), (831, 25290), (843, 24930), (1385, 15174), (1405, 14958), (1662, 12645), (1686, 12465), (2493, 8430), (2529, 8310), (2770, 7587), (2810, 7479), (4155, 5058), (4215, 4986)]