21277971

素因数分解:

$3^4\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{167}}^1$

素因数の和:214

約数の個数: 60

約数和(自身を含む): 37850736

約数和(自身を除く): 16572765

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 81, 99, 117, 121, 143, 167, 297, 351, 363, 429, 501, 891, 1053, 1089, 1287, 1503, 1573, 1837, 2171, 3267, 3861, 4509, 4719, 5511, 6513, 9801, 11583, 13527, 14157, 16533, 19539, 20207, 23881, 42471, 49599, 58617, 60621, 71643, 127413, 148797, 175851, 181863, 214929, 262691, 545589, 644787, 788073, 1636767, 1934361, 2364219, 7092657, 21277971]

約数ペア:

[(1, 21277971), (3, 7092657), (9, 2364219), (11, 1934361), (13, 1636767), (27, 788073), (33, 644787), (39, 545589), (81, 262691), (99, 214929), (117, 181863), (121, 175851), (143, 148797), (167, 127413), (297, 71643), (351, 60621), (363, 58617), (429, 49599), (501, 42471), (891, 23881), (1053, 20207), (1089, 19539), (1287, 16533), (1503, 14157), (1573, 13527), (1837, 11583), (2171, 9801), (3267, 6513), (3861, 5511), (4509, 4719)]