21850257

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{53}}^1$

素因数の和:142

約数の個数: 48

約数和(自身を含む): 36033984

約数和(自身を除く): 14183727

約数列:

[1, 3, 11, 13, 31, 33, 39, 53, 93, 143, 159, 341, 403, 429, 583, 689, 961, 1023, 1209, 1643, 1749, 2067, 2883, 4433, 4929, 7579, 10571, 12493, 13299, 18073, 21359, 22737, 31713, 37479, 50933, 54219, 64077, 137423, 152799, 234949, 412269, 560263, 662129, 704847, 1680789, 1986387, 7283419, 21850257]

約数ペア:

[(1, 21850257), (3, 7283419), (11, 1986387), (13, 1680789), (31, 704847), (33, 662129), (39, 560263), (53, 412269), (93, 234949), (143, 152799), (159, 137423), (341, 64077), (403, 54219), (429, 50933), (583, 37479), (689, 31713), (961, 22737), (1023, 21359), (1209, 18073), (1643, 13299), (1749, 12493), (2067, 10571), (2883, 7579), (4433, 4929)]