21648140

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{63671}}^1$

素因数の和:63697

約数の個数: 24

約数和(自身を含む): 48136032

約数和(自身を除く): 26487892

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 63671, 127342, 254684, 318355, 636710, 1082407, 1273420, 2164814, 4329628, 5412035, 10824070, 21648140]

約数ペア:

[(1, 21648140), (2, 10824070), (4, 5412035), (5, 4329628), (10, 2164814), (17, 1273420), (20, 1082407), (34, 636710), (68, 318355), (85, 254684), (170, 127342), (340, 63671)]