21175479

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:149

約数の個数: 64

約数和(自身を含む): 36664320

約数和(自身を除く): 15488841

約数列:

[1, 3, 9, 13, 23, 27, 39, 43, 61, 69, 117, 129, 183, 207, 299, 351, 387, 549, 559, 621, 793, 897, 989, 1161, 1403, 1647, 1677, 2379, 2623, 2691, 2967, 4209, 5031, 7137, 7869, 8073, 8901, 12627, 12857, 15093, 18239, 21411, 23607, 26703, 34099, 37881, 38571, 54717, 60329, 70821, 102297, 115713, 164151, 180987, 306891, 347139, 492453, 542961, 784277, 920673, 1628883, 2352831, 7058493, 21175479]

約数ペア:

[(1, 21175479), (3, 7058493), (9, 2352831), (13, 1628883), (23, 920673), (27, 784277), (39, 542961), (43, 492453), (61, 347139), (69, 306891), (117, 180987), (129, 164151), (183, 115713), (207, 102297), (299, 70821), (351, 60329), (387, 54717), (549, 38571), (559, 37881), (621, 34099), (793, 26703), (897, 23607), (989, 21411), (1161, 18239), (1403, 15093), (1647, 12857), (1677, 12627), (2379, 8901), (2623, 8073), (2691, 7869), (2967, 7137), (4209, 5031)]