21697880

素因数分解:

$2^3\times 5^1\times {\mathrm{542447}}^1$

素因数の和:542458

約数の個数: 16

約数和(自身を含む): 48820320

約数和(自身を除く): 27122440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542447, 1084894, 2169788, 2712235, 4339576, 5424470, 10848940, 21697880]

約数ペア:

[(1, 21697880), (2, 10848940), (4, 5424470), (5, 4339576), (8, 2712235), (10, 2169788), (20, 1084894), (40, 542447)]