18981945

素因数分解:

$3^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{919}}^1$

素因数の和:956

約数の個数: 48

約数和(自身を含む): 36167040

約数和(自身を除く): 17185095

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 243, 255, 405, 459, 765, 919, 1215, 1377, 2295, 2757, 4131, 4595, 6885, 8271, 13785, 15623, 20655, 24813, 41355, 46869, 74439, 78115, 124065, 140607, 223317, 234345, 372195, 421821, 703035, 1116585, 1265463, 2109105, 3796389, 6327315, 18981945]

約数ペア:

[(1, 18981945), (3, 6327315), (5, 3796389), (9, 2109105), (15, 1265463), (17, 1116585), (27, 703035), (45, 421821), (51, 372195), (81, 234345), (85, 223317), (135, 140607), (153, 124065), (243, 78115), (255, 74439), (405, 46869), (459, 41355), (765, 24813), (919, 20655), (1215, 15623), (1377, 13785), (2295, 8271), (2757, 6885), (4131, 4595)]