20787428

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{419}}^1$

素因数の和:659

約数の個数: 24

約数和(自身を含む): 37161600

約数和(自身を除く): 16374172

約数列:

[1, 2, 4, 79, 157, 158, 314, 316, 419, 628, 838, 1676, 12403, 24806, 33101, 49612, 65783, 66202, 131566, 132404, 263132, 5196857, 10393714, 20787428]

約数ペア:

[(1, 20787428), (2, 10393714), (4, 5196857), (79, 263132), (157, 132404), (158, 131566), (314, 66202), (316, 65783), (419, 49612), (628, 33101), (838, 24806), (1676, 12403)]