21561260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{337}}^1\times {\mathrm{457}}^1$

素因数の和:810

約数の個数: 48

約数和(自身を含む): 52014144

約数和(自身を除く): 30452884

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 337, 457, 674, 914, 1348, 1685, 1828, 2285, 2359, 3199, 3370, 4570, 4718, 6398, 6740, 9140, 9436, 11795, 12796, 15995, 23590, 31990, 47180, 63980, 154009, 308018, 616036, 770045, 1078063, 1540090, 2156126, 3080180, 4312252, 5390315, 10780630, 21561260]

約数ペア:

[(1, 21561260), (2, 10780630), (4, 5390315), (5, 4312252), (7, 3080180), (10, 2156126), (14, 1540090), (20, 1078063), (28, 770045), (35, 616036), (70, 308018), (140, 154009), (337, 63980), (457, 47180), (674, 31990), (914, 23590), (1348, 15995), (1685, 12796), (1828, 11795), (2285, 9436), (2359, 9140), (3199, 6740), (3370, 6398), (4570, 4718)]