21216429

素因数分解:

$3^2\times {\mathrm{13}}^3\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:111

約数の個数: 48

約数和(自身を含む): 35271600

約数和(自身を除く): 14055171

約数列:

[1, 3, 9, 13, 29, 37, 39, 87, 111, 117, 169, 261, 333, 377, 481, 507, 1073, 1131, 1443, 1521, 2197, 3219, 3393, 4329, 4901, 6253, 6591, 9657, 13949, 14703, 18759, 19773, 41847, 44109, 56277, 63713, 81289, 125541, 181337, 191139, 243867, 544011, 573417, 731601, 1632033, 2357381, 7072143, 21216429]

約数ペア:

[(1, 21216429), (3, 7072143), (9, 2357381), (13, 1632033), (29, 731601), (37, 573417), (39, 544011), (87, 243867), (111, 191139), (117, 181337), (169, 125541), (261, 81289), (333, 63713), (377, 56277), (481, 44109), (507, 41847), (1073, 19773), (1131, 18759), (1443, 14703), (1521, 13949), (2197, 9657), (3219, 6591), (3393, 6253), (4329, 4901)]