18978040

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12823}}^1$

素因数の和:12871

約数の個数: 32

約数和(自身を含む): 43858080

約数和(自身を除く): 24880040

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 12823, 25646, 51292, 64115, 102584, 128230, 256460, 474451, 512920, 948902, 1897804, 2372255, 3795608, 4744510, 9489020, 18978040]

約数ペア:

[(1, 18978040), (2, 9489020), (4, 4744510), (5, 3795608), (8, 2372255), (10, 1897804), (20, 948902), (37, 512920), (40, 474451), (74, 256460), (148, 128230), (185, 102584), (296, 64115), (370, 51292), (740, 25646), (1480, 12823)]