21656778

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{587}}^1$

素因数の和:659

約数の個数: 64

約数和(自身を含む): 52157952

約数和(自身を除く): 30501174

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 43, 66, 78, 86, 129, 143, 258, 286, 429, 473, 559, 587, 858, 946, 1118, 1174, 1419, 1677, 1761, 2838, 3354, 3522, 6149, 6457, 7631, 12298, 12914, 15262, 18447, 19371, 22893, 25241, 36894, 38742, 45786, 50482, 75723, 83941, 151446, 167882, 251823, 277651, 328133, 503646, 555302, 656266, 832953, 984399, 1665906, 1968798, 3609463, 7218926, 10828389, 21656778]

約数ペア:

[(1, 21656778), (2, 10828389), (3, 7218926), (6, 3609463), (11, 1968798), (13, 1665906), (22, 984399), (26, 832953), (33, 656266), (39, 555302), (43, 503646), (66, 328133), (78, 277651), (86, 251823), (129, 167882), (143, 151446), (258, 83941), (286, 75723), (429, 50482), (473, 45786), (559, 38742), (587, 36894), (858, 25241), (946, 22893), (1118, 19371), (1174, 18447), (1419, 15262), (1677, 12914), (1761, 12298), (2838, 7631), (3354, 6457), (3522, 6149)]