81509883

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{193}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 145700208

約数和(自身を除く): 64190325

約数列:

[1, 3, 7, 13, 17, 21, 39, 49, 51, 91, 119, 147, 169, 193, 221, 273, 357, 507, 579, 637, 663, 833, 1183, 1351, 1547, 1911, 2499, 2509, 2873, 3281, 3549, 4053, 4641, 7527, 8281, 8619, 9457, 9843, 10829, 17563, 20111, 22967, 24843, 28371, 32487, 32617, 42653, 52689, 60333, 68901, 97851, 122941, 127959, 140777, 160769, 228319, 298571, 368823, 422331, 482307, 554489, 684957, 895713, 1598233, 1663467, 2089997, 3881423, 4794699, 6269991, 11644269, 27169961, 81509883]

約数ペア:

[(1, 81509883), (3, 27169961), (7, 11644269), (13, 6269991), (17, 4794699), (21, 3881423), (39, 2089997), (49, 1663467), (51, 1598233), (91, 895713), (119, 684957), (147, 554489), (169, 482307), (193, 422331), (221, 368823), (273, 298571), (357, 228319), (507, 160769), (579, 140777), (637, 127959), (663, 122941), (833, 97851), (1183, 68901), (1351, 60333), (1547, 52689), (1911, 42653), (2499, 32617), (2509, 32487), (2873, 28371), (3281, 24843), (3549, 22967), (4053, 20111), (4641, 17563), (7527, 10829), (8281, 9843), (8619, 9457)]