20050520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{709}}^1$

素因数の和:828

約数の個数: 64

約数和(自身を含む): 52142400

約数和(自身を除く): 32091880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 101, 140, 202, 280, 404, 505, 707, 709, 808, 1010, 1414, 1418, 2020, 2828, 2836, 3535, 3545, 4040, 4963, 5656, 5672, 7070, 7090, 9926, 14140, 14180, 19852, 24815, 28280, 28360, 39704, 49630, 71609, 99260, 143218, 198520, 286436, 358045, 501263, 572872, 716090, 1002526, 1432180, 2005052, 2506315, 2864360, 4010104, 5012630, 10025260, 20050520]

約数ペア:

[(1, 20050520), (2, 10025260), (4, 5012630), (5, 4010104), (7, 2864360), (8, 2506315), (10, 2005052), (14, 1432180), (20, 1002526), (28, 716090), (35, 572872), (40, 501263), (56, 358045), (70, 286436), (101, 198520), (140, 143218), (202, 99260), (280, 71609), (404, 49630), (505, 39704), (707, 28360), (709, 28280), (808, 24815), (1010, 19852), (1414, 14180), (1418, 14140), (2020, 9926), (2828, 7090), (2836, 7070), (3535, 5672), (3545, 5656), (4040, 4963)]