15721209

素因数分解:

$3^4\times 7^2\times {\mathrm{17}}^1\times {\mathrm{233}}^1$

素因数の和:276

約数の個数: 60

約数和(自身を含む): 29050164

約数和(自身を除く): 13328955

約数列:

[1, 3, 7, 9, 17, 21, 27, 49, 51, 63, 81, 119, 147, 153, 189, 233, 357, 441, 459, 567, 699, 833, 1071, 1323, 1377, 1631, 2097, 2499, 3213, 3961, 3969, 4893, 6291, 7497, 9639, 11417, 11883, 14679, 18873, 22491, 27727, 34251, 35649, 44037, 67473, 83181, 102753, 106947, 132111, 194089, 249543, 308259, 320841, 582267, 748629, 924777, 1746801, 2245887, 5240403, 15721209]

約数ペア:

[(1, 15721209), (3, 5240403), (7, 2245887), (9, 1746801), (17, 924777), (21, 748629), (27, 582267), (49, 320841), (51, 308259), (63, 249543), (81, 194089), (119, 132111), (147, 106947), (153, 102753), (189, 83181), (233, 67473), (357, 44037), (441, 35649), (459, 34251), (567, 27727), (699, 22491), (833, 18873), (1071, 14679), (1323, 11883), (1377, 11417), (1631, 9639), (2097, 7497), (2499, 6291), (3213, 4893), (3961, 3969)]