21903520

素因数分解:

$2^5\times 5^1\times {\mathrm{136897}}^1$

素因数の和:136912

約数の個数: 24

約数和(自身を含む): 51747444

約数和(自身を除く): 29843924

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 136897, 273794, 547588, 684485, 1095176, 1368970, 2190352, 2737940, 4380704, 5475880, 10951760, 21903520]

約数ペア:

[(1, 21903520), (2, 10951760), (4, 5475880), (5, 4380704), (8, 2737940), (10, 2190352), (16, 1368970), (20, 1095176), (32, 684485), (40, 547588), (80, 273794), (160, 136897)]