21320901

素因数分解:

$3^4\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1213}}^1$

素因数の和:1263

約数の個数: 40

約数和(自身を含む): 37604864

約数和(自身を除く): 16283963

約数列:

[1, 3, 7, 9, 21, 27, 31, 63, 81, 93, 189, 217, 279, 567, 651, 837, 1213, 1953, 2511, 3639, 5859, 8491, 10917, 17577, 25473, 32751, 37603, 76419, 98253, 112809, 229257, 263221, 338427, 687771, 789663, 1015281, 2368989, 3045843, 7106967, 21320901]

約数ペア:

[(1, 21320901), (3, 7106967), (7, 3045843), (9, 2368989), (21, 1015281), (27, 789663), (31, 687771), (63, 338427), (81, 263221), (93, 229257), (189, 112809), (217, 98253), (279, 76419), (567, 37603), (651, 32751), (837, 25473), (1213, 17577), (1953, 10917), (2511, 8491), (3639, 5859)]