39958180

素因数分解:

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

素因数の和:628

約数の個数: 48

約数和(自身を含む): 86929920

約数和(自身を除く): 46971740

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 97, 172, 194, 215, 388, 430, 479, 485, 860, 958, 970, 1916, 1940, 2395, 4171, 4790, 8342, 9580, 16684, 20597, 20855, 41194, 41710, 46463, 82388, 83420, 92926, 102985, 185852, 205970, 232315, 411940, 464630, 929260, 1997909, 3995818, 7991636, 9989545, 19979090, 39958180]

約数ペア:

[(1, 39958180), (2, 19979090), (4, 9989545), (5, 7991636), (10, 3995818), (20, 1997909), (43, 929260), (86, 464630), (97, 411940), (172, 232315), (194, 205970), (215, 185852), (388, 102985), (430, 92926), (479, 83420), (485, 82388), (860, 46463), (958, 41710), (970, 41194), (1916, 20855), (1940, 20597), (2395, 16684), (4171, 9580), (4790, 8342)]