20089720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{457}}^1$

素因数の和:632

約数の個数: 64

約数和(自身を含む): 52102080

約数和(自身を除く): 32012360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 457, 628, 785, 914, 1099, 1256, 1570, 1828, 2198, 2285, 3140, 3199, 3656, 4396, 4570, 5495, 6280, 6398, 8792, 9140, 10990, 12796, 15995, 18280, 21980, 25592, 31990, 43960, 63980, 71749, 127960, 143498, 286996, 358745, 502243, 573992, 717490, 1004486, 1434980, 2008972, 2511215, 2869960, 4017944, 5022430, 10044860, 20089720]

約数ペア:

[(1, 20089720), (2, 10044860), (4, 5022430), (5, 4017944), (7, 2869960), (8, 2511215), (10, 2008972), (14, 1434980), (20, 1004486), (28, 717490), (35, 573992), (40, 502243), (56, 358745), (70, 286996), (140, 143498), (157, 127960), (280, 71749), (314, 63980), (457, 43960), (628, 31990), (785, 25592), (914, 21980), (1099, 18280), (1256, 15995), (1570, 12796), (1828, 10990), (2198, 9140), (2285, 8792), (3140, 6398), (3199, 6280), (3656, 5495), (4396, 4570)]