20560720

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1637}}^1$

素因数の和:1807

約数の個数: 40

約数和(自身を含む): 48137544

約数和(自身を除く): 27576824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 1637, 2512, 3140, 3274, 6280, 6548, 8185, 12560, 13096, 16370, 26192, 32740, 65480, 130960, 257009, 514018, 1028036, 1285045, 2056072, 2570090, 4112144, 5140180, 10280360, 20560720]

約数ペア:

[(1, 20560720), (2, 10280360), (4, 5140180), (5, 4112144), (8, 2570090), (10, 2056072), (16, 1285045), (20, 1028036), (40, 514018), (80, 257009), (157, 130960), (314, 65480), (628, 32740), (785, 26192), (1256, 16370), (1570, 13096), (1637, 12560), (2512, 8185), (3140, 6548), (3274, 6280)]