20415213

素因数分解:

$3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1187}}^1$

素因数の和:1223

約数の個数: 48

約数和(自身を含む): 37920960

約数和(自身を除く): 17505747

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 91, 117, 147, 189, 273, 351, 441, 637, 819, 1187, 1323, 1911, 2457, 3561, 5733, 8309, 10683, 15431, 17199, 24927, 32049, 46293, 58163, 74781, 108017, 138879, 174489, 224343, 324051, 416637, 523467, 756119, 972153, 1570401, 2268357, 2916459, 6805071, 20415213]

約数ペア:

[(1, 20415213), (3, 6805071), (7, 2916459), (9, 2268357), (13, 1570401), (21, 972153), (27, 756119), (39, 523467), (49, 416637), (63, 324051), (91, 224343), (117, 174489), (147, 138879), (189, 108017), (273, 74781), (351, 58163), (441, 46293), (637, 32049), (819, 24927), (1187, 17199), (1323, 15431), (1911, 10683), (2457, 8309), (3561, 5733)]