19865925

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1549}}^1$

素因数の和:1587

約数の個数: 48

約数和(自身を含む): 38440000

約数和(自身を除く): 18574075

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 135, 171, 225, 285, 475, 513, 675, 855, 1425, 1549, 2565, 4275, 4647, 7745, 12825, 13941, 23235, 29431, 38725, 41823, 69705, 88293, 116175, 147155, 209115, 264879, 348525, 441465, 735775, 794637, 1045575, 1324395, 2207325, 3973185, 6621975, 19865925]

約数ペア:

[(1, 19865925), (3, 6621975), (5, 3973185), (9, 2207325), (15, 1324395), (19, 1045575), (25, 794637), (27, 735775), (45, 441465), (57, 348525), (75, 264879), (95, 209115), (135, 147155), (171, 116175), (225, 88293), (285, 69705), (475, 41823), (513, 38725), (675, 29431), (855, 23235), (1425, 13941), (1549, 12825), (2565, 7745), (4275, 4647)]