21241640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{709}}^1$

素因数の和:834

約数の個数: 64

約数和(自身を含む): 55209600

約数和(自身を除く): 33967960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 107, 140, 214, 280, 428, 535, 709, 749, 856, 1070, 1418, 1498, 2140, 2836, 2996, 3545, 3745, 4280, 4963, 5672, 5992, 7090, 7490, 9926, 14180, 14980, 19852, 24815, 28360, 29960, 39704, 49630, 75863, 99260, 151726, 198520, 303452, 379315, 531041, 606904, 758630, 1062082, 1517260, 2124164, 2655205, 3034520, 4248328, 5310410, 10620820, 21241640]

約数ペア:

[(1, 21241640), (2, 10620820), (4, 5310410), (5, 4248328), (7, 3034520), (8, 2655205), (10, 2124164), (14, 1517260), (20, 1062082), (28, 758630), (35, 606904), (40, 531041), (56, 379315), (70, 303452), (107, 198520), (140, 151726), (214, 99260), (280, 75863), (428, 49630), (535, 39704), (709, 29960), (749, 28360), (856, 24815), (1070, 19852), (1418, 14980), (1498, 14180), (2140, 9926), (2836, 7490), (2996, 7090), (3545, 5992), (3745, 5672), (4280, 4963)]