21521409

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2543}}^1$

素因数の和:2597

約数の個数: 32

約数和(自身を含む): 36470784

約数和(自身を除く): 14949375

約数列:

[1, 3, 7, 13, 21, 31, 39, 91, 93, 217, 273, 403, 651, 1209, 2543, 2821, 7629, 8463, 17801, 33059, 53403, 78833, 99177, 231413, 236499, 551831, 694239, 1024829, 1655493, 3074487, 7173803, 21521409]

約数ペア:

[(1, 21521409), (3, 7173803), (7, 3074487), (13, 1655493), (21, 1024829), (31, 694239), (39, 551831), (91, 236499), (93, 231413), (217, 99177), (273, 78833), (403, 53403), (651, 33059), (1209, 17801), (2543, 8463), (2821, 7629)]