208367620

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{25981}}^1$

素因数の和:26391

約数の個数: 24

約数和(自身を含む): 438680088

約数和(自身を除く): 230312468

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 4010, 8020, 25981, 51962, 103924, 129905, 259810, 519620, 10418381, 20836762, 41673524, 52091905, 104183810, 208367620]

約数ペア:

[(1, 208367620), (2, 104183810), (4, 52091905), (5, 41673524), (10, 20836762), (20, 10418381), (401, 519620), (802, 259810), (1604, 129905), (2005, 103924), (4010, 51962), (8020, 25981)]