21259494

素因数分解:

$2^1\times 3^2\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{293}}^1$

素因数の和:469

約数の個数: 48

約数和(自身を含む): 48157200

約数和(自身を除く): 26897706

約数列:

[1, 2, 3, 6, 9, 18, 29, 58, 87, 139, 174, 261, 278, 293, 417, 522, 586, 834, 879, 1251, 1758, 2502, 2637, 4031, 5274, 8062, 8497, 12093, 16994, 24186, 25491, 36279, 40727, 50982, 72558, 76473, 81454, 122181, 152946, 244362, 366543, 733086, 1181083, 2362166, 3543249, 7086498, 10629747, 21259494]

約数ペア:

[(1, 21259494), (2, 10629747), (3, 7086498), (6, 3543249), (9, 2362166), (18, 1181083), (29, 733086), (58, 366543), (87, 244362), (139, 152946), (174, 122181), (261, 81454), (278, 76473), (293, 72558), (417, 50982), (522, 40727), (586, 36279), (834, 25491), (879, 24186), (1251, 16994), (1758, 12093), (2502, 8497), (2637, 8062), (4031, 5274)]