20813793

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{239}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17893407

約数列:

[1, 3, 7, 11, 13, 21, 29, 33, 39, 77, 87, 91, 143, 203, 231, 239, 273, 319, 377, 429, 609, 717, 957, 1001, 1131, 1673, 2233, 2629, 2639, 3003, 3107, 4147, 5019, 6699, 6931, 7887, 7917, 9321, 12441, 18403, 20793, 21749, 29029, 34177, 48517, 55209, 65247, 76241, 87087, 90103, 102531, 145551, 228723, 239239, 270309, 533687, 630721, 717717, 991133, 1601061, 1892163, 2973399, 6937931, 20813793]

約数ペア:

[(1, 20813793), (3, 6937931), (7, 2973399), (11, 1892163), (13, 1601061), (21, 991133), (29, 717717), (33, 630721), (39, 533687), (77, 270309), (87, 239239), (91, 228723), (143, 145551), (203, 102531), (231, 90103), (239, 87087), (273, 76241), (319, 65247), (377, 55209), (429, 48517), (609, 34177), (717, 29029), (957, 21749), (1001, 20793), (1131, 18403), (1673, 12441), (2233, 9321), (2629, 7917), (2639, 7887), (3003, 6931), (3107, 6699), (4147, 5019)]