18993231

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{191}}^1$

素因数の和:356

約数の個数: 32

約数和(自身を含む): 29491200

約数和(自身を除く): 10497969

約数列:

[1, 3, 9, 27, 29, 87, 127, 191, 261, 381, 573, 783, 1143, 1719, 3429, 3683, 5157, 5539, 11049, 16617, 24257, 33147, 49851, 72771, 99441, 149553, 218313, 654939, 703453, 2110359, 6331077, 18993231]

約数ペア:

[(1, 18993231), (3, 6331077), (9, 2110359), (27, 703453), (29, 654939), (87, 218313), (127, 149553), (191, 99441), (261, 72771), (381, 49851), (573, 33147), (783, 24257), (1143, 16617), (1719, 11049), (3429, 5539), (3683, 5157)]