21205205

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{227}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 31124736

約数和(自身を除く): 9919531

約数列:

[1, 5, 7, 17, 35, 85, 119, 157, 227, 595, 785, 1099, 1135, 1589, 2669, 3859, 5495, 7945, 13345, 18683, 19295, 27013, 35639, 93415, 135065, 178195, 249473, 605863, 1247365, 3029315, 4241041, 21205205]

約数ペア:

[(1, 21205205), (5, 4241041), (7, 3029315), (17, 1247365), (35, 605863), (85, 249473), (119, 178195), (157, 135065), (227, 93415), (595, 35639), (785, 27013), (1099, 19295), (1135, 18683), (1589, 13345), (2669, 7945), (3859, 5495)]