208889681

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{311}}^1$

素因数の和:414

約数の個数: 48

約数和(自身を含む): 288148224

約数和(自身を除く): 79258543

約数列:

[1, 7, 11, 13, 61, 77, 91, 121, 143, 311, 427, 671, 793, 847, 1001, 1573, 2177, 3421, 4043, 4697, 5551, 7381, 8723, 11011, 18971, 23947, 28301, 37631, 44473, 51667, 61061, 95953, 132797, 208681, 246623, 263417, 311311, 489203, 671671, 1460767, 1726361, 2295491, 2712853, 3424421, 16068437, 18989971, 29841383, 208889681]

約数ペア:

[(1, 208889681), (7, 29841383), (11, 18989971), (13, 16068437), (61, 3424421), (77, 2712853), (91, 2295491), (121, 1726361), (143, 1460767), (311, 671671), (427, 489203), (671, 311311), (793, 263417), (847, 246623), (1001, 208681), (1573, 132797), (2177, 95953), (3421, 61061), (4043, 51667), (4697, 44473), (5551, 37631), (7381, 28301), (8723, 23947), (11011, 18971)]