20921008

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{24671}}^1$

素因数の和:24732

約数の個数: 20

約数和(自身を含む): 41300928

約数和(自身を除く): 20379920

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 24671, 49342, 98684, 197368, 394736, 1307563, 2615126, 5230252, 10460504, 20921008]

約数ペア:

[(1, 20921008), (2, 10460504), (4, 5230252), (8, 2615126), (16, 1307563), (53, 394736), (106, 197368), (212, 98684), (424, 49342), (848, 24671)]