21804940

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4889}}^1$

素因数の和:5121

約数の個数: 24

約数和(自身を含む): 46005120

約数和(自身を除く): 24200180

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4889, 9778, 19556, 24445, 48890, 97780, 1090247, 2180494, 4360988, 5451235, 10902470, 21804940]

約数ペア:

[(1, 21804940), (2, 10902470), (4, 5451235), (5, 4360988), (10, 2180494), (20, 1090247), (223, 97780), (446, 48890), (892, 24445), (1115, 19556), (2230, 9778), (4460, 4889)]