21158643

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{457}}^1$

素因数の和:555

約数の個数: 32

約数和(自身を含む): 32712192

約数和(自身を除く): 11553549

約数列:

[1, 3, 11, 23, 33, 61, 69, 183, 253, 457, 671, 759, 1371, 1403, 2013, 4209, 5027, 10511, 15081, 15433, 27877, 31533, 46299, 83631, 115621, 306647, 346863, 641171, 919941, 1923513, 7052881, 21158643]

約数ペア:

[(1, 21158643), (3, 7052881), (11, 1923513), (23, 919941), (33, 641171), (61, 346863), (69, 306647), (183, 115621), (253, 83631), (457, 46299), (671, 31533), (759, 27877), (1371, 15433), (1403, 15081), (2013, 10511), (4209, 5027)]