20986623

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 36315136

約数和(自身を除く): 15328513

約数列:

[1, 3, 7, 9, 21, 43, 61, 63, 127, 129, 183, 301, 381, 387, 427, 549, 889, 903, 1143, 1281, 2623, 2667, 2709, 3843, 5461, 7747, 7869, 8001, 16383, 18361, 23241, 23607, 38227, 49149, 54229, 55083, 69723, 114681, 162687, 165249, 333121, 344043, 488061, 999363, 2331847, 2998089, 6995541, 20986623]

約数ペア:

[(1, 20986623), (3, 6995541), (7, 2998089), (9, 2331847), (21, 999363), (43, 488061), (61, 344043), (63, 333121), (127, 165249), (129, 162687), (183, 114681), (301, 69723), (381, 55083), (387, 54229), (427, 49149), (549, 38227), (889, 23607), (903, 23241), (1143, 18361), (1281, 16383), (2623, 8001), (2667, 7869), (2709, 7747), (3843, 5461)]