20987385

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{479}}^1$

素因数の和:637

約数の個数: 32

約数和(自身を含む): 35389440

約数和(自身を除く): 14402055

約数列:

[1, 3, 5, 15, 23, 69, 115, 127, 345, 381, 479, 635, 1437, 1905, 2395, 2921, 7185, 8763, 11017, 14605, 33051, 43815, 55085, 60833, 165255, 182499, 304165, 912495, 1399159, 4197477, 6995795, 20987385]

約数ペア:

[(1, 20987385), (3, 6995795), (5, 4197477), (15, 1399159), (23, 912495), (69, 304165), (115, 182499), (127, 165255), (345, 60833), (381, 55085), (479, 43815), (635, 33051), (1437, 14605), (1905, 11017), (2395, 8763), (2921, 7185)]