18805815

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{263}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 37559808

約数和(自身を除く): 18753993

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 227, 263, 315, 681, 789, 1135, 1315, 1589, 1841, 2043, 2367, 3405, 3945, 4767, 5523, 7945, 9205, 10215, 11835, 14301, 16569, 23835, 27615, 59701, 71505, 82845, 179103, 298505, 417907, 537309, 895515, 1253721, 2089535, 2686545, 3761163, 6268605, 18805815]

約数ペア:

[(1, 18805815), (3, 6268605), (5, 3761163), (7, 2686545), (9, 2089535), (15, 1253721), (21, 895515), (35, 537309), (45, 417907), (63, 298505), (105, 179103), (227, 82845), (263, 71505), (315, 59701), (681, 27615), (789, 23835), (1135, 16569), (1315, 14301), (1589, 11835), (1841, 10215), (2043, 9205), (2367, 7945), (3405, 5523), (3945, 4767)]