21004855

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{647}}^1$

素因数の和:846

約数の個数: 16

約数和(自身を含む): 26002944

約数和(自身を除く): 4998089

約数列:

[1, 5, 43, 151, 215, 647, 755, 3235, 6493, 27821, 32465, 97697, 139105, 488485, 4200971, 21004855]

約数ペア:

[(1, 21004855), (5, 4200971), (43, 488485), (151, 139105), (215, 97697), (647, 32465), (755, 27821), (3235, 6493)]