21020720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37537}}^1$

素因数の和:37557

約数の個数: 40

約数和(自身を含む): 55856544

約数和(自身を除く): 34835824

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37537, 75074, 150148, 187685, 262759, 300296, 375370, 525518, 600592, 750740, 1051036, 1313795, 1501480, 2102072, 2627590, 3002960, 4204144, 5255180, 10510360, 21020720]

約数ペア:

[(1, 21020720), (2, 10510360), (4, 5255180), (5, 4204144), (7, 3002960), (8, 2627590), (10, 2102072), (14, 1501480), (16, 1313795), (20, 1051036), (28, 750740), (35, 600592), (40, 525518), (56, 375370), (70, 300296), (80, 262759), (112, 187685), (140, 150148), (280, 75074), (560, 37537)]