18103720

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{907}}^1$

素因数の和:1417

約数の個数: 32

約数和(自身を含む): 40860000

約数和(自身を除く): 22756280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 907, 998, 1814, 1996, 2495, 3628, 3992, 4535, 4990, 7256, 9070, 9980, 18140, 19960, 36280, 452593, 905186, 1810372, 2262965, 3620744, 4525930, 9051860, 18103720]

約数ペア:

[(1, 18103720), (2, 9051860), (4, 4525930), (5, 3620744), (8, 2262965), (10, 1810372), (20, 905186), (40, 452593), (499, 36280), (907, 19960), (998, 18140), (1814, 9980), (1996, 9070), (2495, 7256), (3628, 4990), (3992, 4535)]