21721953

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 32735232

約数和(自身を除く): 11013279

約数列:

[1, 3, 11, 33, 71, 73, 127, 213, 219, 381, 781, 803, 1397, 2343, 2409, 4191, 5183, 9017, 9271, 15549, 27051, 27813, 57013, 99187, 101981, 171039, 297561, 305943, 658241, 1974723, 7240651, 21721953]

約数ペア:

[(1, 21721953), (3, 7240651), (11, 1974723), (33, 658241), (71, 305943), (73, 297561), (127, 171039), (213, 101981), (219, 99187), (381, 57013), (781, 27813), (803, 27051), (1397, 15549), (2343, 9271), (2409, 9017), (4191, 5183)]