21947780

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{479}}^1$

素因数の和:596

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 26436220

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 79, 116, 145, 158, 290, 316, 395, 479, 580, 790, 958, 1580, 1916, 2291, 2395, 4582, 4790, 9164, 9580, 11455, 13891, 22910, 27782, 37841, 45820, 55564, 69455, 75682, 138910, 151364, 189205, 277820, 378410, 756820, 1097389, 2194778, 4389556, 5486945, 10973890, 21947780]

約数ペア:

[(1, 21947780), (2, 10973890), (4, 5486945), (5, 4389556), (10, 2194778), (20, 1097389), (29, 756820), (58, 378410), (79, 277820), (116, 189205), (145, 151364), (158, 138910), (290, 75682), (316, 69455), (395, 55564), (479, 45820), (580, 37841), (790, 27782), (958, 22910), (1580, 13891), (1916, 11455), (2291, 9580), (2395, 9164), (4582, 4790)]