18857680

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2203}}^1$

素因数の和:2323

約数の個数: 40

約数和(自身を含む): 44273952

約数和(自身を除く): 25416272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2203, 4280, 4406, 8560, 8812, 11015, 17624, 22030, 35248, 44060, 88120, 176240, 235721, 471442, 942884, 1178605, 1885768, 2357210, 3771536, 4714420, 9428840, 18857680]

約数ペア:

[(1, 18857680), (2, 9428840), (4, 4714420), (5, 3771536), (8, 2357210), (10, 1885768), (16, 1178605), (20, 942884), (40, 471442), (80, 235721), (107, 176240), (214, 88120), (428, 44060), (535, 35248), (856, 22030), (1070, 17624), (1712, 11015), (2140, 8812), (2203, 8560), (4280, 4406)]