21387585

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1319}}^1$

素因数の和:1397

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 15107775

約数列:

[1, 3, 5, 15, 23, 47, 69, 115, 141, 235, 345, 705, 1081, 1319, 3243, 3957, 5405, 6595, 16215, 19785, 30337, 61993, 91011, 151685, 185979, 309965, 455055, 929895, 1425839, 4277517, 7129195, 21387585]

約数ペア:

[(1, 21387585), (3, 7129195), (5, 4277517), (15, 1425839), (23, 929895), (47, 455055), (69, 309965), (115, 185979), (141, 151685), (235, 91011), (345, 61993), (705, 30337), (1081, 19785), (1319, 16215), (3243, 6595), (3957, 5405)]