19387755

素因数分解:

$3^9\times 5^1\times {\mathrm{197}}^1$

素因数の和:229

約数の個数: 40

約数和(自身を含む): 35074512

約数和(自身を除く): 15686757

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 197, 243, 405, 591, 729, 985, 1215, 1773, 2187, 2955, 3645, 5319, 6561, 8865, 10935, 15957, 19683, 26595, 32805, 47871, 79785, 98415, 143613, 239355, 430839, 718065, 1292517, 2154195, 3877551, 6462585, 19387755]

約数ペア:

[(1, 19387755), (3, 6462585), (5, 3877551), (9, 2154195), (15, 1292517), (27, 718065), (45, 430839), (81, 239355), (135, 143613), (197, 98415), (243, 79785), (405, 47871), (591, 32805), (729, 26595), (985, 19683), (1215, 15957), (1773, 10935), (2187, 8865), (2955, 6561), (3645, 5319)]