21191973

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{463}}^1$

素因数の和:569

約数の個数: 32

約数和(自身を含む): 32962560

約数和(自身を除く): 11770587

約数列:

[1, 3, 11, 19, 33, 57, 73, 209, 219, 463, 627, 803, 1387, 1389, 2409, 4161, 5093, 8797, 15257, 15279, 26391, 33799, 45771, 96767, 101397, 290301, 371789, 642181, 1115367, 1926543, 7063991, 21191973]

約数ペア:

[(1, 21191973), (3, 7063991), (11, 1926543), (19, 1115367), (33, 642181), (57, 371789), (73, 290301), (209, 101397), (219, 96767), (463, 45771), (627, 33799), (803, 26391), (1387, 15279), (1389, 15257), (2409, 8797), (4161, 5093)]