20854155

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1669}}^1$

素因数の和:1708

約数の個数: 48

約数和(自身を含む): 41122080

約数和(自身を除く): 20267925

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 255, 357, 595, 735, 833, 1669, 1785, 2499, 4165, 5007, 8345, 11683, 12495, 25035, 28373, 35049, 58415, 81781, 85119, 141865, 175245, 198611, 245343, 408905, 425595, 595833, 993055, 1226715, 1390277, 2979165, 4170831, 6951385, 20854155]

約数ペア:

[(1, 20854155), (3, 6951385), (5, 4170831), (7, 2979165), (15, 1390277), (17, 1226715), (21, 993055), (35, 595833), (49, 425595), (51, 408905), (85, 245343), (105, 198611), (119, 175245), (147, 141865), (245, 85119), (255, 81781), (357, 58415), (595, 35049), (735, 28373), (833, 25035), (1669, 12495), (1785, 11683), (2499, 8345), (4165, 5007)]