20984103

素因数分解:

$3^4\times 7^2\times {\mathrm{17}}^1\times {\mathrm{311}}^1$

素因数の和:354

約数の個数: 60

約数和(自身を含む): 38733552

約数和(自身を除く): 17749449

約数列:

[1, 3, 7, 9, 17, 21, 27, 49, 51, 63, 81, 119, 147, 153, 189, 311, 357, 441, 459, 567, 833, 933, 1071, 1323, 1377, 2177, 2499, 2799, 3213, 3969, 5287, 6531, 7497, 8397, 9639, 15239, 15861, 19593, 22491, 25191, 37009, 45717, 47583, 58779, 67473, 111027, 137151, 142749, 176337, 259063, 333081, 411453, 428247, 777189, 999243, 1234359, 2331567, 2997729, 6994701, 20984103]

約数ペア:

[(1, 20984103), (3, 6994701), (7, 2997729), (9, 2331567), (17, 1234359), (21, 999243), (27, 777189), (49, 428247), (51, 411453), (63, 333081), (81, 259063), (119, 176337), (147, 142749), (153, 137151), (189, 111027), (311, 67473), (357, 58779), (441, 47583), (459, 45717), (567, 37009), (833, 25191), (933, 22491), (1071, 19593), (1323, 15861), (1377, 15239), (2177, 9639), (2499, 8397), (2799, 7497), (3213, 6531), (3969, 5287)]