18640040

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{16069}}^1$

素因数の和:16109

約数の個数: 32

約数和(自身を含む): 43389000

約数和(自身を除く): 24748960

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 16069, 32138, 64276, 80345, 128552, 160690, 321380, 466001, 642760, 932002, 1864004, 2330005, 3728008, 4660010, 9320020, 18640040]

約数ペア:

[(1, 18640040), (2, 9320020), (4, 4660010), (5, 3728008), (8, 2330005), (10, 1864004), (20, 932002), (29, 642760), (40, 466001), (58, 321380), (116, 160690), (145, 128552), (232, 80345), (290, 64276), (580, 32138), (1160, 16069)]