21252621

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:130

約数の個数: 64

約数和(自身を含む): 35481600

約数和(自身を除く): 14228979

約数列:

[1, 3, 13, 19, 23, 29, 39, 43, 57, 69, 87, 129, 247, 299, 377, 437, 551, 559, 667, 741, 817, 897, 989, 1131, 1247, 1311, 1653, 1677, 2001, 2451, 2967, 3741, 5681, 7163, 8671, 10621, 12673, 12857, 16211, 17043, 18791, 21489, 23693, 26013, 28681, 31863, 38019, 38571, 48633, 56373, 71079, 86043, 164749, 244283, 308009, 372853, 494247, 544939, 732849, 924027, 1118559, 1634817, 7084207, 21252621]

約数ペア:

[(1, 21252621), (3, 7084207), (13, 1634817), (19, 1118559), (23, 924027), (29, 732849), (39, 544939), (43, 494247), (57, 372853), (69, 308009), (87, 244283), (129, 164749), (247, 86043), (299, 71079), (377, 56373), (437, 48633), (551, 38571), (559, 38019), (667, 31863), (741, 28681), (817, 26013), (897, 23693), (989, 21489), (1131, 18791), (1247, 17043), (1311, 16211), (1653, 12857), (1677, 12673), (2001, 10621), (2451, 8671), (2967, 7163), (3741, 5681)]