20211709

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{347}}^1$

素因数の和:564

約数の個数: 16

約数和(自身を含む): 23753088

約数和(自身を除く): 3541379

約数列:

[1, 7, 53, 157, 347, 371, 1099, 2429, 8321, 18391, 54479, 58247, 128737, 381353, 2887387, 20211709]

約数ペア:

[(1, 20211709), (7, 2887387), (53, 381353), (157, 128737), (347, 58247), (371, 54479), (1099, 18391), (2429, 8321)]