21161547

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1657}}^1$

素因数の和:1720

約数の個数: 32

約数和(自身を含む): 35016960

約数和(自身を除く): 13855413

約数列:

[1, 3, 9, 11, 27, 33, 43, 99, 129, 297, 387, 473, 1161, 1419, 1657, 4257, 4971, 12771, 14913, 18227, 44739, 54681, 71251, 164043, 213753, 492129, 641259, 783761, 1923777, 2351283, 7053849, 21161547]

約数ペア:

[(1, 21161547), (3, 7053849), (9, 2351283), (11, 1923777), (27, 783761), (33, 641259), (43, 492129), (99, 213753), (129, 164043), (297, 71251), (387, 54681), (473, 44739), (1161, 18227), (1419, 14913), (1657, 12771), (4257, 4971)]