20290900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{101}}^1$

素因数の和:170

約数の個数: 108

約数和(自身を含む): 52988796

約数和(自身を除く): 32697896

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 41, 49, 50, 70, 82, 98, 100, 101, 140, 164, 175, 196, 202, 205, 245, 287, 350, 404, 410, 490, 505, 574, 700, 707, 820, 980, 1010, 1025, 1148, 1225, 1414, 1435, 2009, 2020, 2050, 2450, 2525, 2828, 2870, 3535, 4018, 4100, 4141, 4900, 4949, 5050, 5740, 7070, 7175, 8036, 8282, 9898, 10045, 10100, 14140, 14350, 16564, 17675, 19796, 20090, 20705, 24745, 28700, 28987, 35350, 40180, 41410, 49490, 50225, 57974, 70700, 82820, 98980, 100450, 103525, 115948, 123725, 144935, 200900, 202909, 207050, 247450, 289870, 405818, 414100, 494900, 579740, 724675, 811636, 1014545, 1449350, 2029090, 2898700, 4058180, 5072725, 10145450, 20290900]

約数ペア:

[(1, 20290900), (2, 10145450), (4, 5072725), (5, 4058180), (7, 2898700), (10, 2029090), (14, 1449350), (20, 1014545), (25, 811636), (28, 724675), (35, 579740), (41, 494900), (49, 414100), (50, 405818), (70, 289870), (82, 247450), (98, 207050), (100, 202909), (101, 200900), (140, 144935), (164, 123725), (175, 115948), (196, 103525), (202, 100450), (205, 98980), (245, 82820), (287, 70700), (350, 57974), (404, 50225), (410, 49490), (490, 41410), (505, 40180), (574, 35350), (700, 28987), (707, 28700), (820, 24745), (980, 20705), (1010, 20090), (1025, 19796), (1148, 17675), (1225, 16564), (1414, 14350), (1435, 14140), (2009, 10100), (2020, 10045), (2050, 9898), (2450, 8282), (2525, 8036), (2828, 7175), (2870, 7070), (3535, 5740), (4018, 5050), (4100, 4949), (4141, 4900)]