19998885

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{78427}}^1$

素因数の和:78452

約数の個数: 16

約数和(自身を含む): 33880896

約数和(自身を除く): 13882011

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 78427, 235281, 392135, 1176405, 1333259, 3999777, 6666295, 19998885]

約数ペア:

[(1, 19998885), (3, 6666295), (5, 3999777), (15, 1333259), (17, 1176405), (51, 392135), (85, 235281), (255, 78427)]