21413529

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 34504704

約数和(自身を除く): 13091175

約数列:

[1, 3, 9, 23, 31, 47, 69, 71, 93, 141, 207, 213, 279, 423, 639, 713, 1081, 1457, 1633, 2139, 2201, 3243, 3337, 4371, 4899, 6417, 6603, 9729, 10011, 13113, 14697, 19809, 30033, 33511, 50623, 76751, 100533, 103447, 151869, 230253, 301599, 310341, 455607, 690759, 931023, 2379281, 7137843, 21413529]

約数ペア:

[(1, 21413529), (3, 7137843), (9, 2379281), (23, 931023), (31, 690759), (47, 455607), (69, 310341), (71, 301599), (93, 230253), (141, 151869), (207, 103447), (213, 100533), (279, 76751), (423, 50623), (639, 33511), (713, 30033), (1081, 19809), (1457, 14697), (1633, 13113), (2139, 10011), (2201, 9729), (3243, 6603), (3337, 6417), (4371, 4899)]