21090726

素因数分解:

$2^1\times 3^3\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{293}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 49674240

約数和(自身を除く): 28583514

約数列:

[1, 2, 3, 6, 9, 18, 27, 31, 43, 54, 62, 86, 93, 129, 186, 258, 279, 293, 387, 558, 586, 774, 837, 879, 1161, 1333, 1674, 1758, 2322, 2637, 2666, 3999, 5274, 7911, 7998, 9083, 11997, 12599, 15822, 18166, 23994, 25198, 27249, 35991, 37797, 54498, 71982, 75594, 81747, 113391, 163494, 226782, 245241, 340173, 390569, 490482, 680346, 781138, 1171707, 2343414, 3515121, 7030242, 10545363, 21090726]

約数ペア:

[(1, 21090726), (2, 10545363), (3, 7030242), (6, 3515121), (9, 2343414), (18, 1171707), (27, 781138), (31, 680346), (43, 490482), (54, 390569), (62, 340173), (86, 245241), (93, 226782), (129, 163494), (186, 113391), (258, 81747), (279, 75594), (293, 71982), (387, 54498), (558, 37797), (586, 35991), (774, 27249), (837, 25198), (879, 23994), (1161, 18166), (1333, 15822), (1674, 12599), (1758, 11997), (2322, 9083), (2637, 7998), (2666, 7911), (3999, 5274)]