18909045

素因数分解:

$3^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:296

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 15685515

約数列:

[1, 3, 5, 9, 15, 27, 45, 79, 81, 135, 197, 237, 243, 395, 405, 591, 711, 985, 1185, 1215, 1773, 2133, 2955, 3555, 5319, 6399, 8865, 10665, 15563, 15957, 19197, 26595, 31995, 46689, 47871, 77815, 79785, 95985, 140067, 233445, 239355, 420201, 700335, 1260603, 2101005, 3781809, 6303015, 18909045]

約数ペア:

[(1, 18909045), (3, 6303015), (5, 3781809), (9, 2101005), (15, 1260603), (27, 700335), (45, 420201), (79, 239355), (81, 233445), (135, 140067), (197, 95985), (237, 79785), (243, 77815), (395, 47871), (405, 46689), (591, 31995), (711, 26595), (985, 19197), (1185, 15957), (1215, 15563), (1773, 10665), (2133, 8865), (2955, 6399), (3555, 5319)]