19870773

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 31770816

約数和(自身を除く): 11900043

約数列:

[1, 3, 13, 17, 39, 41, 43, 51, 123, 129, 221, 289, 533, 559, 663, 697, 731, 867, 1599, 1677, 1763, 2091, 2193, 3757, 5289, 9061, 9503, 11271, 11849, 12427, 22919, 27183, 28509, 29971, 35547, 37281, 68757, 89913, 154037, 161551, 389623, 462111, 484653, 509507, 1168869, 1528521, 6623591, 19870773]

約数ペア:

[(1, 19870773), (3, 6623591), (13, 1528521), (17, 1168869), (39, 509507), (41, 484653), (43, 462111), (51, 389623), (123, 161551), (129, 154037), (221, 89913), (289, 68757), (533, 37281), (559, 35547), (663, 29971), (697, 28509), (731, 27183), (867, 22919), (1599, 12427), (1677, 11849), (1763, 11271), (2091, 9503), (2193, 9061), (3757, 5289)]