21231972

素因数分解:

$2^2\times 3^2\times {\mathrm{139}}^1\times {\mathrm{4243}}^1$

素因数の和:4392

約数の個数: 36

約数和(自身を含む): 54068560

約数和(自身を除く): 32836588

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 139, 278, 417, 556, 834, 1251, 1668, 2502, 4243, 5004, 8486, 12729, 16972, 25458, 38187, 50916, 76374, 152748, 589777, 1179554, 1769331, 2359108, 3538662, 5307993, 7077324, 10615986, 21231972]

約数ペア:

[(1, 21231972), (2, 10615986), (3, 7077324), (4, 5307993), (6, 3538662), (9, 2359108), (12, 1769331), (18, 1179554), (36, 589777), (139, 152748), (278, 76374), (417, 50916), (556, 38187), (834, 25458), (1251, 16972), (1668, 12729), (2502, 8486), (4243, 5004)]