21000960820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{710933}}^1$

素因数の和:711160

約数の個数: 48

約数和(自身を含む): 50641250688

約数和(自身を除く): 29640289868

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 844, 1055, 1477, 2110, 2954, 4220, 5908, 7385, 14770, 29540, 710933, 1421866, 2843732, 3554665, 4976531, 7109330, 9953062, 14218660, 19906124, 24882655, 49765310, 99530620, 150006863, 300013726, 600027452, 750034315, 1050048041, 1500068630, 2100096082, 3000137260, 4200192164, 5250240205, 10500480410, 21000960820]

約数ペア:

[(1, 21000960820), (2, 10500480410), (4, 5250240205), (5, 4200192164), (7, 3000137260), (10, 2100096082), (14, 1500068630), (20, 1050048041), (28, 750034315), (35, 600027452), (70, 300013726), (140, 150006863), (211, 99530620), (422, 49765310), (844, 24882655), (1055, 19906124), (1477, 14218660), (2110, 9953062), (2954, 7109330), (4220, 4976531), (5908, 3554665), (7385, 2843732), (14770, 1421866), (29540, 710933)]