19872020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3301}}^1$

素因数の和:3360

約数の個数: 48

約数和(自身を含む): 48816768

約数和(自身を除く): 28944748

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 3301, 6020, 6602, 13204, 16505, 23107, 33010, 46214, 66020, 92428, 115535, 141943, 231070, 283886, 462140, 567772, 709715, 993601, 1419430, 1987202, 2838860, 3974404, 4968005, 9936010, 19872020]

約数ペア:

[(1, 19872020), (2, 9936010), (4, 4968005), (5, 3974404), (7, 2838860), (10, 1987202), (14, 1419430), (20, 993601), (28, 709715), (35, 567772), (43, 462140), (70, 283886), (86, 231070), (140, 141943), (172, 115535), (215, 92428), (301, 66020), (430, 46214), (602, 33010), (860, 23107), (1204, 16505), (1505, 13204), (3010, 6602), (3301, 6020)]