21350360

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12413}}^1$

素因数の和:12467

約数の個数: 32

約数和(自身を含む): 49159440

約数和(自身を除く): 27809080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12413, 24826, 49652, 62065, 99304, 124130, 248260, 496520, 533759, 1067518, 2135036, 2668795, 4270072, 5337590, 10675180, 21350360]

約数ペア:

[(1, 21350360), (2, 10675180), (4, 5337590), (5, 4270072), (8, 2668795), (10, 2135036), (20, 1067518), (40, 533759), (43, 496520), (86, 248260), (172, 124130), (215, 99304), (344, 62065), (430, 49652), (860, 24826), (1720, 12413)]