19979090

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{479}}^1$

素因数の和:626

約数の個数: 32

約数和(自身を含む): 37255680

約数和(自身を除く): 17276590

約数列:

[1, 2, 5, 10, 43, 86, 97, 194, 215, 430, 479, 485, 958, 970, 2395, 4171, 4790, 8342, 20597, 20855, 41194, 41710, 46463, 92926, 102985, 205970, 232315, 464630, 1997909, 3995818, 9989545, 19979090]

約数ペア:

[(1, 19979090), (2, 9989545), (5, 3995818), (10, 1997909), (43, 464630), (86, 232315), (97, 205970), (194, 102985), (215, 92926), (430, 46463), (479, 41710), (485, 41194), (958, 20855), (970, 20597), (2395, 8342), (4171, 4790)]