21052647

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1787}}^1$

素因数の和:1828

約数の個数: 48

約数和(自身を含む): 40165632

約数和(自身を除く): 19112985

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 51, 63, 77, 99, 119, 153, 187, 231, 357, 561, 693, 1071, 1309, 1683, 1787, 3927, 5361, 11781, 12509, 16083, 19657, 30379, 37527, 58971, 91137, 112581, 137599, 176913, 212653, 273411, 334169, 412797, 637959, 1002507, 1238391, 1913877, 2339183, 3007521, 7017549, 21052647]

約数ペア:

[(1, 21052647), (3, 7017549), (7, 3007521), (9, 2339183), (11, 1913877), (17, 1238391), (21, 1002507), (33, 637959), (51, 412797), (63, 334169), (77, 273411), (99, 212653), (119, 176913), (153, 137599), (187, 112581), (231, 91137), (357, 58971), (561, 37527), (693, 30379), (1071, 19657), (1309, 16083), (1683, 12509), (1787, 11781), (3927, 5361)]