21331420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{2063}}^1$

素因数の和:2130

約数の個数: 48

約数和(自身を含む): 49932288

約数和(自身を除く): 28600868

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 47, 55, 94, 110, 188, 220, 235, 470, 517, 940, 1034, 2063, 2068, 2585, 4126, 5170, 8252, 10315, 10340, 20630, 22693, 41260, 45386, 90772, 96961, 113465, 193922, 226930, 387844, 453860, 484805, 969610, 1066571, 1939220, 2133142, 4266284, 5332855, 10665710, 21331420]

約数ペア:

[(1, 21331420), (2, 10665710), (4, 5332855), (5, 4266284), (10, 2133142), (11, 1939220), (20, 1066571), (22, 969610), (44, 484805), (47, 453860), (55, 387844), (94, 226930), (110, 193922), (188, 113465), (220, 96961), (235, 90772), (470, 45386), (517, 41260), (940, 22693), (1034, 20630), (2063, 10340), (2068, 10315), (2585, 8252), (4126, 5170)]