21401691

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{3019}}^1$

素因数の和:3178

約数の個数: 16

約数和(自身を含む): 30441600

約数和(自身を除く): 9039909

約数列:

[1, 3, 17, 51, 139, 417, 2363, 3019, 7089, 9057, 51323, 153969, 419641, 1258923, 7133897, 21401691]

約数ペア:

[(1, 21401691), (3, 7133897), (17, 1258923), (51, 419641), (139, 153969), (417, 51323), (2363, 9057), (3019, 7089)]