21586131

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 37372608

約数和(自身を除く): 15786477

約数列:

[1, 3, 7, 9, 21, 41, 61, 63, 123, 137, 183, 287, 369, 411, 427, 549, 861, 959, 1233, 1281, 2501, 2583, 2877, 3843, 5617, 7503, 8357, 8631, 16851, 17507, 22509, 25071, 39319, 50553, 52521, 58499, 75213, 117957, 157563, 175497, 342637, 353871, 526491, 1027911, 2398459, 3083733, 7195377, 21586131]

約数ペア:

[(1, 21586131), (3, 7195377), (7, 3083733), (9, 2398459), (21, 1027911), (41, 526491), (61, 353871), (63, 342637), (123, 175497), (137, 157563), (183, 117957), (287, 75213), (369, 58499), (411, 52521), (427, 50553), (549, 39319), (861, 25071), (959, 22509), (1233, 17507), (1281, 16851), (2501, 8631), (2583, 8357), (2877, 7503), (3843, 5617)]