2780289

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{229}}^1$

素因数の和:325

約数の個数: 24

約数和(自身を含む): 4305600

約数和(自身を除く): 1525311

約数列:

[1, 3, 9, 19, 57, 71, 171, 213, 229, 639, 687, 1349, 2061, 4047, 4351, 12141, 13053, 16259, 39159, 48777, 146331, 308921, 926763, 2780289]

約数ペア:

[(1, 2780289), (3, 926763), (9, 308921), (19, 146331), (57, 48777), (71, 39159), (171, 16259), (213, 13053), (229, 12141), (639, 4351), (687, 4047), (1349, 2061)]