18181818

素因数分解:

$2^1\times 3^2\times {\mathrm{73}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:319

約数の個数: 48

約数和(自身を含む): 40623336

約数和(自身を除く): 22441518

約数列:

[1, 2, 3, 6, 9, 18, 73, 101, 137, 146, 202, 219, 274, 303, 411, 438, 606, 657, 822, 909, 1233, 1314, 1818, 2466, 7373, 10001, 13837, 14746, 20002, 22119, 27674, 30003, 41511, 44238, 60006, 66357, 83022, 90009, 124533, 132714, 180018, 249066, 1010101, 2020202, 3030303, 6060606, 9090909, 18181818]

約数ペア:

[(1, 18181818), (2, 9090909), (3, 6060606), (6, 3030303), (9, 2020202), (18, 1010101), (73, 249066), (101, 180018), (137, 132714), (146, 124533), (202, 90009), (219, 83022), (274, 66357), (303, 60006), (411, 44238), (438, 41511), (606, 30003), (657, 27674), (822, 22119), (909, 20002), (1233, 14746), (1314, 13837), (1818, 10001), (2466, 7373)]