21121048

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:244

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 24238952

約数列:

[1, 2, 4, 8, 13, 26, 29, 47, 52, 58, 94, 104, 116, 149, 188, 232, 298, 376, 377, 596, 611, 754, 1192, 1222, 1363, 1508, 1937, 2444, 2726, 3016, 3874, 4321, 4888, 5452, 7003, 7748, 8642, 10904, 14006, 15496, 17284, 17719, 28012, 34568, 35438, 56024, 56173, 70876, 91039, 112346, 141752, 182078, 203087, 224692, 364156, 406174, 449384, 728312, 812348, 1624696, 2640131, 5280262, 10560524, 21121048]

約数ペア:

[(1, 21121048), (2, 10560524), (4, 5280262), (8, 2640131), (13, 1624696), (26, 812348), (29, 728312), (47, 449384), (52, 406174), (58, 364156), (94, 224692), (104, 203087), (116, 182078), (149, 141752), (188, 112346), (232, 91039), (298, 70876), (376, 56173), (377, 56024), (596, 35438), (611, 34568), (754, 28012), (1192, 17719), (1222, 17284), (1363, 15496), (1508, 14006), (1937, 10904), (2444, 8642), (2726, 7748), (3016, 7003), (3874, 5452), (4321, 4888)]