21640208

素因数分解:

$2^4\times {\mathrm{569}}^1\times {\mathrm{2377}}^1$

素因数の和:2954

約数の個数: 20

約数和(自身を含む): 42019260

約数和(自身を除く): 20379052

約数列:

[1, 2, 4, 8, 16, 569, 1138, 2276, 2377, 4552, 4754, 9104, 9508, 19016, 38032, 1352513, 2705026, 5410052, 10820104, 21640208]

約数ペア:

[(1, 21640208), (2, 10820104), (4, 5410052), (8, 2705026), (16, 1352513), (569, 38032), (1138, 19016), (2276, 9508), (2377, 9104), (4552, 4754)]