21789860

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26573}}^1$

素因数の和:26623

約数の個数: 24

約数和(自身を含む): 46876536

約数和(自身を除く): 25086676

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26573, 53146, 106292, 132865, 265730, 531460, 1089493, 2178986, 4357972, 5447465, 10894930, 21789860]

約数ペア:

[(1, 21789860), (2, 10894930), (4, 5447465), (5, 4357972), (10, 2178986), (20, 1089493), (41, 531460), (82, 265730), (164, 132865), (205, 106292), (410, 53146), (820, 26573)]