21488585

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{619}}^1$

素因数の和:808

約数の個数: 16

約数和(自身を含む): 26516160

約数和(自身を除く): 5027575

約数列:

[1, 5, 53, 131, 265, 619, 655, 3095, 6943, 32807, 34715, 81089, 164035, 405445, 4297717, 21488585]

約数ペア:

[(1, 21488585), (5, 4297717), (53, 405445), (131, 164035), (265, 81089), (619, 34715), (655, 32807), (3095, 6943)]