20884780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{211}}^1$

素因数の和:335

約数の個数: 72

約数和(自身を含む): 51767856

約数和(自身を除く): 30883076

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 101, 140, 196, 202, 211, 245, 404, 422, 490, 505, 707, 844, 980, 1010, 1055, 1414, 1477, 2020, 2110, 2828, 2954, 3535, 4220, 4949, 5908, 7070, 7385, 9898, 10339, 14140, 14770, 19796, 20678, 21311, 24745, 29540, 41356, 42622, 49490, 51695, 85244, 98980, 103390, 106555, 149177, 206780, 213110, 298354, 426220, 596708, 745885, 1044239, 1491770, 2088478, 2983540, 4176956, 5221195, 10442390, 20884780]

約数ペア:

[(1, 20884780), (2, 10442390), (4, 5221195), (5, 4176956), (7, 2983540), (10, 2088478), (14, 1491770), (20, 1044239), (28, 745885), (35, 596708), (49, 426220), (70, 298354), (98, 213110), (101, 206780), (140, 149177), (196, 106555), (202, 103390), (211, 98980), (245, 85244), (404, 51695), (422, 49490), (490, 42622), (505, 41356), (707, 29540), (844, 24745), (980, 21311), (1010, 20678), (1055, 19796), (1414, 14770), (1477, 14140), (2020, 10339), (2110, 9898), (2828, 7385), (2954, 7070), (3535, 5908), (4220, 4949)]