21380271

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1657}}^1$

素因数の和:1711

約数の個数: 32

約数和(自身を含む): 34380288

約数和(自身を除く): 13000017

約数列:

[1, 3, 11, 17, 23, 33, 51, 69, 187, 253, 391, 561, 759, 1173, 1657, 4301, 4971, 12903, 18227, 28169, 38111, 54681, 84507, 114333, 309859, 419221, 647887, 929577, 1257663, 1943661, 7126757, 21380271]

約数ペア:

[(1, 21380271), (3, 7126757), (11, 1943661), (17, 1257663), (23, 929577), (33, 647887), (51, 419221), (69, 309859), (187, 114333), (253, 84507), (391, 54681), (561, 38111), (759, 28169), (1173, 18227), (1657, 12903), (4301, 4971)]