19866465

素因数分解:

$3^5\times 5^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:300

約数の個数: 48

約数和(自身を含む): 36324288

約数和(自身を除く): 16457823

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 83, 135, 197, 243, 249, 405, 415, 591, 747, 985, 1215, 1245, 1773, 2241, 2955, 3735, 5319, 6723, 8865, 11205, 15957, 16351, 20169, 26595, 33615, 47871, 49053, 79785, 81755, 100845, 147159, 239355, 245265, 441477, 735795, 1324431, 2207385, 3973293, 6622155, 19866465]

約数ペア:

[(1, 19866465), (3, 6622155), (5, 3973293), (9, 2207385), (15, 1324431), (27, 735795), (45, 441477), (81, 245265), (83, 239355), (135, 147159), (197, 100845), (243, 81755), (249, 79785), (405, 49053), (415, 47871), (591, 33615), (747, 26595), (985, 20169), (1215, 16351), (1245, 15957), (1773, 11205), (2241, 8865), (2955, 6723), (3735, 5319)]