21251990

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1\times {\mathrm{439}}^1$

素因数の和:596

約数の個数: 32

約数和(自身を含む): 39536640

約数和(自身を除く): 18284650

約数列:

[1, 2, 5, 10, 47, 94, 103, 206, 235, 439, 470, 515, 878, 1030, 2195, 4390, 4841, 9682, 20633, 24205, 41266, 45217, 48410, 90434, 103165, 206330, 226085, 452170, 2125199, 4250398, 10625995, 21251990]

約数ペア:

[(1, 21251990), (2, 10625995), (5, 4250398), (10, 2125199), (47, 452170), (94, 226085), (103, 206330), (206, 103165), (235, 90434), (439, 48410), (470, 45217), (515, 41266), (878, 24205), (1030, 20633), (2195, 9682), (4390, 4841)]