21782439

素因数分解:

$3^4\times 7^1\times {\mathrm{41}}^1\times {\mathrm{937}}^1$

素因数の和:997

約数の個数: 40

約数和(自身を含む): 38135328

約数和(自身を除く): 16352889

約数列:

[1, 3, 7, 9, 21, 27, 41, 63, 81, 123, 189, 287, 369, 567, 861, 937, 1107, 2583, 2811, 3321, 6559, 7749, 8433, 19677, 23247, 25299, 38417, 59031, 75897, 115251, 177093, 268919, 345753, 531279, 806757, 1037259, 2420271, 3111777, 7260813, 21782439]

約数ペア:

[(1, 21782439), (3, 7260813), (7, 3111777), (9, 2420271), (21, 1037259), (27, 806757), (41, 531279), (63, 345753), (81, 268919), (123, 177093), (189, 115251), (287, 75897), (369, 59031), (567, 38417), (861, 25299), (937, 23247), (1107, 19677), (2583, 8433), (2811, 7749), (3321, 6559)]