21904220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84247}}^1$

素因数の和:84269

約数の個数: 24

約数和(自身を含む): 49537824

約数和(自身を除く): 27633604

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84247, 168494, 336988, 421235, 842470, 1095211, 1684940, 2190422, 4380844, 5476055, 10952110, 21904220]

約数ペア:

[(1, 21904220), (2, 10952110), (4, 5476055), (5, 4380844), (10, 2190422), (13, 1684940), (20, 1095211), (26, 842470), (52, 421235), (65, 336988), (130, 168494), (260, 84247)]