21315021

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{479}}^1$

素因数の和:665

約数の個数: 32

約数和(自身を含む): 35266560

約数和(自身を除く): 13951539

約数列:

[1, 3, 7, 13, 21, 39, 91, 163, 273, 479, 489, 1141, 1437, 2119, 3353, 3423, 6227, 6357, 10059, 14833, 18681, 43589, 44499, 78077, 130767, 234231, 546539, 1015001, 1639617, 3045003, 7105007, 21315021]

約数ペア:

[(1, 21315021), (3, 7105007), (7, 3045003), (13, 1639617), (21, 1015001), (39, 546539), (91, 234231), (163, 130767), (273, 78077), (479, 44499), (489, 43589), (1141, 18681), (1437, 14833), (2119, 10059), (3353, 6357), (3423, 6227)]