21308945

素因数分解:

$5^1\times 7^1\times {\mathrm{647}}^1\times {\mathrm{941}}^1$

素因数の和:1600

約数の個数: 16

約数和(自身を含む): 29299968

約数和(自身を除く): 7991023

約数列:

[1, 5, 7, 35, 647, 941, 3235, 4529, 4705, 6587, 22645, 32935, 608827, 3044135, 4261789, 21308945]

約数ペア:

[(1, 21308945), (5, 4261789), (7, 3044135), (35, 608827), (647, 32935), (941, 22645), (3235, 6587), (4529, 4705)]