20471451

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{401}}^1$

素因数の和:452

約数の個数: 64

約数和(自身を含む): 38900736

約数和(自身を除く): 18429285

約数列:

[1, 3, 7, 11, 13, 17, 21, 33, 39, 51, 77, 91, 119, 143, 187, 221, 231, 273, 357, 401, 429, 561, 663, 1001, 1203, 1309, 1547, 2431, 2807, 3003, 3927, 4411, 4641, 5213, 6817, 7293, 8421, 13233, 15639, 17017, 20451, 30877, 36491, 47719, 51051, 57343, 74987, 88621, 92631, 109473, 143157, 172029, 224961, 265863, 401401, 524909, 620347, 974831, 1204203, 1574727, 1861041, 2924493, 6823817, 20471451]

約数ペア:

[(1, 20471451), (3, 6823817), (7, 2924493), (11, 1861041), (13, 1574727), (17, 1204203), (21, 974831), (33, 620347), (39, 524909), (51, 401401), (77, 265863), (91, 224961), (119, 172029), (143, 143157), (187, 109473), (221, 92631), (231, 88621), (273, 74987), (357, 57343), (401, 51051), (429, 47719), (561, 36491), (663, 30877), (1001, 20451), (1203, 17017), (1309, 15639), (1547, 13233), (2431, 8421), (2807, 7293), (3003, 6817), (3927, 5213), (4411, 4641)]