20793640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{103}}^2$

素因数の和:231

約数の個数: 72

約数和(自身を含む): 54957690

約数和(自身を除く): 34164050

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 103, 140, 196, 206, 245, 280, 392, 412, 490, 515, 721, 824, 980, 1030, 1442, 1960, 2060, 2884, 3605, 4120, 5047, 5768, 7210, 10094, 10609, 14420, 20188, 21218, 25235, 28840, 40376, 42436, 50470, 53045, 74263, 84872, 100940, 106090, 148526, 201880, 212180, 297052, 371315, 424360, 519841, 594104, 742630, 1039682, 1485260, 2079364, 2599205, 2970520, 4158728, 5198410, 10396820, 20793640]

約数ペア:

[(1, 20793640), (2, 10396820), (4, 5198410), (5, 4158728), (7, 2970520), (8, 2599205), (10, 2079364), (14, 1485260), (20, 1039682), (28, 742630), (35, 594104), (40, 519841), (49, 424360), (56, 371315), (70, 297052), (98, 212180), (103, 201880), (140, 148526), (196, 106090), (206, 100940), (245, 84872), (280, 74263), (392, 53045), (412, 50470), (490, 42436), (515, 40376), (721, 28840), (824, 25235), (980, 21218), (1030, 20188), (1442, 14420), (1960, 10609), (2060, 10094), (2884, 7210), (3605, 5768), (4120, 5047)]