21158709

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:138

約数の個数: 64

約数和(自身を含む): 35954688

約数和(自身を除く): 14795979

約数列:

[1, 3, 11, 13, 31, 33, 37, 39, 43, 93, 111, 129, 143, 341, 403, 407, 429, 473, 481, 559, 1023, 1147, 1209, 1221, 1333, 1419, 1443, 1591, 1677, 3441, 3999, 4433, 4773, 5291, 6149, 12617, 13299, 14663, 14911, 15873, 17329, 17501, 18447, 20683, 37851, 43989, 44733, 49321, 51987, 52503, 62049, 147963, 164021, 190619, 227513, 492063, 542531, 571857, 641173, 682539, 1627593, 1923519, 7052903, 21158709]

約数ペア:

[(1, 21158709), (3, 7052903), (11, 1923519), (13, 1627593), (31, 682539), (33, 641173), (37, 571857), (39, 542531), (43, 492063), (93, 227513), (111, 190619), (129, 164021), (143, 147963), (341, 62049), (403, 52503), (407, 51987), (429, 49321), (473, 44733), (481, 43989), (559, 37851), (1023, 20683), (1147, 18447), (1209, 17501), (1221, 17329), (1333, 15873), (1419, 14911), (1443, 14663), (1591, 13299), (1677, 12617), (3441, 6149), (3999, 5291), (4433, 4773)]