21804280

素因数分解:

$2^3\times 5^1\times {\mathrm{601}}^1\times {\mathrm{907}}^1$

素因数の和:1519

約数の個数: 32

約数和(自身を含む): 49195440

約数和(自身を除く): 27391160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 601, 907, 1202, 1814, 2404, 3005, 3628, 4535, 4808, 6010, 7256, 9070, 12020, 18140, 24040, 36280, 545107, 1090214, 2180428, 2725535, 4360856, 5451070, 10902140, 21804280]

約数ペア:

[(1, 21804280), (2, 10902140), (4, 5451070), (5, 4360856), (8, 2725535), (10, 2180428), (20, 1090214), (40, 545107), (601, 36280), (907, 24040), (1202, 18140), (1814, 12020), (2404, 9070), (3005, 7256), (3628, 6010), (4535, 4808)]