21218758

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{271}}^1\times {\mathrm{3559}}^1$

素因数の和:3843

約数の個数: 16

約数和(自身を含む): 34859520

約数和(自身を除く): 13640762

約数列:

[1, 2, 11, 22, 271, 542, 2981, 3559, 5962, 7118, 39149, 78298, 964489, 1928978, 10609379, 21218758]

約数ペア:

[(1, 21218758), (2, 10609379), (11, 1928978), (22, 964489), (271, 78298), (542, 39149), (2981, 7118), (3559, 5962)]