21881091

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{409}}^1\times {\mathrm{1049}}^1$

素因数の和:1478

約数の個数: 16

約数和(自身を含む): 30996000

約数和(自身を除く): 9114909

約数列:

[1, 3, 17, 51, 409, 1049, 1227, 3147, 6953, 17833, 20859, 53499, 429041, 1287123, 7293697, 21881091]

約数ペア:

[(1, 21881091), (3, 7293697), (17, 1287123), (51, 429041), (409, 53499), (1049, 20859), (1227, 17833), (3147, 6953)]