21010280

素因数分解:

$2^3\times 5^1\times {\mathrm{525257}}^1$

素因数の和:525268

約数の個数: 16

約数和(自身を含む): 47273220

約数和(自身を除く): 26262940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525257, 1050514, 2101028, 2626285, 4202056, 5252570, 10505140, 21010280]

約数ペア:

[(1, 21010280), (2, 10505140), (4, 5252570), (5, 4202056), (8, 2626285), (10, 2101028), (20, 1050514), (40, 525257)]