20974220

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{421}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 45940608

約数和(自身を除く): 24966388

約数列:

[1, 2, 4, 5, 10, 20, 47, 53, 94, 106, 188, 212, 235, 265, 421, 470, 530, 842, 940, 1060, 1684, 2105, 2491, 4210, 4982, 8420, 9964, 12455, 19787, 22313, 24910, 39574, 44626, 49820, 79148, 89252, 98935, 111565, 197870, 223130, 395740, 446260, 1048711, 2097422, 4194844, 5243555, 10487110, 20974220]

約数ペア:

[(1, 20974220), (2, 10487110), (4, 5243555), (5, 4194844), (10, 2097422), (20, 1048711), (47, 446260), (53, 395740), (94, 223130), (106, 197870), (188, 111565), (212, 98935), (235, 89252), (265, 79148), (421, 49820), (470, 44626), (530, 39574), (842, 24910), (940, 22313), (1060, 19787), (1684, 12455), (2105, 9964), (2491, 8420), (4210, 4982)]