21485331

素因数分解:

$3^5\times 7^1\times {\mathrm{17}}^1\times {\mathrm{743}}^1$

素因数の和:782

約数の個数: 48

約数和(自身を含む): 38997504

約数和(自身を除く): 17512173

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 243, 357, 459, 567, 743, 1071, 1377, 1701, 2229, 3213, 4131, 5201, 6687, 9639, 12631, 15603, 20061, 28917, 37893, 46809, 60183, 88417, 113679, 140427, 180549, 265251, 341037, 421281, 795753, 1023111, 1263843, 2387259, 3069333, 7161777, 21485331]

約数ペア:

[(1, 21485331), (3, 7161777), (7, 3069333), (9, 2387259), (17, 1263843), (21, 1023111), (27, 795753), (51, 421281), (63, 341037), (81, 265251), (119, 180549), (153, 140427), (189, 113679), (243, 88417), (357, 60183), (459, 46809), (567, 37893), (743, 28917), (1071, 20061), (1377, 15603), (1701, 12631), (2229, 9639), (3213, 6687), (4131, 5201)]