21003651

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{229}}^1$

素因数の和:360

約数の個数: 32

約数和(自身を含む): 32384000

約数和(自身を除く): 11380349

約数列:

[1, 3, 9, 27, 43, 79, 129, 229, 237, 387, 687, 711, 1161, 2061, 2133, 3397, 6183, 9847, 10191, 18091, 29541, 30573, 54273, 88623, 91719, 162819, 265869, 488457, 777913, 2333739, 7001217, 21003651]

約数ペア:

[(1, 21003651), (3, 7001217), (9, 2333739), (27, 777913), (43, 488457), (79, 265869), (129, 162819), (229, 91719), (237, 88623), (387, 54273), (687, 30573), (711, 29541), (1161, 18091), (2061, 10191), (2133, 9847), (3397, 6183)]