9991821

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{151}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 16109568

約数和(自身を除く): 6117747

約数列:

[1, 3, 7, 21, 23, 69, 137, 151, 161, 411, 453, 483, 959, 1057, 2877, 3151, 3171, 3473, 9453, 10419, 20687, 22057, 24311, 62061, 66171, 72933, 144809, 434427, 475801, 1427403, 3330607, 9991821]

約数ペア:

[(1, 9991821), (3, 3330607), (7, 1427403), (21, 475801), (23, 434427), (69, 144809), (137, 72933), (151, 66171), (161, 62061), (411, 24311), (453, 22057), (483, 20687), (959, 10419), (1057, 9453), (2877, 3473), (3151, 3171)]