20571243

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:192

約数の個数: 64

約数和(自身を含む): 37171200

約数和(自身を除く): 16599957

約数列:

[1, 3, 7, 11, 19, 21, 33, 43, 57, 77, 109, 129, 133, 209, 231, 301, 327, 399, 473, 627, 763, 817, 903, 1199, 1419, 1463, 2071, 2289, 2451, 3311, 3597, 4389, 4687, 5719, 6213, 8393, 8987, 9933, 14061, 14497, 17157, 22781, 25179, 26961, 32809, 43491, 51557, 62909, 68343, 89053, 98427, 154671, 159467, 188727, 267159, 360899, 478401, 623371, 979583, 1082697, 1870113, 2938749, 6857081, 20571243]

約数ペア:

[(1, 20571243), (3, 6857081), (7, 2938749), (11, 1870113), (19, 1082697), (21, 979583), (33, 623371), (43, 478401), (57, 360899), (77, 267159), (109, 188727), (129, 159467), (133, 154671), (209, 98427), (231, 89053), (301, 68343), (327, 62909), (399, 51557), (473, 43491), (627, 32809), (763, 26961), (817, 25179), (903, 22781), (1199, 17157), (1419, 14497), (1463, 14061), (2071, 9933), (2289, 8987), (2451, 8393), (3311, 6213), (3597, 5719), (4389, 4687)]