20211659140

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{401}}^1\times {\mathrm{25981}}^1$

素因数の和:26488

約数の個数: 48

約数和(自身を含む): 42990648624

約数和(自身を除く): 22778989484

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 401, 485, 802, 970, 1604, 1940, 2005, 4010, 8020, 25981, 38897, 51962, 77794, 103924, 129905, 155588, 194485, 259810, 388970, 519620, 777940, 2520157, 5040314, 10080628, 10418381, 12600785, 20836762, 25201570, 41673524, 50403140, 52091905, 104183810, 208367620, 1010582957, 2021165914, 4042331828, 5052914785, 10105829570, 20211659140]

約数ペア:

[(1, 20211659140), (2, 10105829570), (4, 5052914785), (5, 4042331828), (10, 2021165914), (20, 1010582957), (97, 208367620), (194, 104183810), (388, 52091905), (401, 50403140), (485, 41673524), (802, 25201570), (970, 20836762), (1604, 12600785), (1940, 10418381), (2005, 10080628), (4010, 5040314), (8020, 2520157), (25981, 777940), (38897, 519620), (51962, 388970), (77794, 259810), (103924, 194485), (129905, 155588)]