81780867

素因数分解:

$3^3\times 7^1\times {\mathrm{103}}^1\times {\mathrm{4201}}^1$

素因数の和:4320

約数の個数: 32

約数和(自身を含む): 139842560

約数和(自身を除く): 58061693

約数列:

[1, 3, 7, 9, 21, 27, 63, 103, 189, 309, 721, 927, 2163, 2781, 4201, 6489, 12603, 19467, 29407, 37809, 88221, 113427, 264663, 432703, 793989, 1298109, 3028921, 3894327, 9086763, 11682981, 27260289, 81780867]

約数ペア:

[(1, 81780867), (3, 27260289), (7, 11682981), (9, 9086763), (21, 3894327), (27, 3028921), (63, 1298109), (103, 793989), (189, 432703), (309, 264663), (721, 113427), (927, 88221), (2163, 37809), (2781, 29407), (4201, 19467), (6489, 12603)]