31381779

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{331}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 52493184

約数和(自身を除く): 21111405

約数列:

[1, 3, 11, 13, 17, 33, 39, 51, 143, 169, 187, 221, 331, 429, 507, 561, 663, 993, 1859, 2431, 2873, 3641, 4303, 5577, 5627, 7293, 8619, 10923, 12909, 16881, 31603, 47333, 55939, 61897, 73151, 94809, 141999, 167817, 185691, 219453, 615329, 804661, 950963, 1845987, 2413983, 2852889, 10460593, 31381779]

約数ペア:

[(1, 31381779), (3, 10460593), (11, 2852889), (13, 2413983), (17, 1845987), (33, 950963), (39, 804661), (51, 615329), (143, 219453), (169, 185691), (187, 167817), (221, 141999), (331, 94809), (429, 73151), (507, 61897), (561, 55939), (663, 47333), (993, 31603), (1859, 16881), (2431, 12909), (2873, 10923), (3641, 8619), (4303, 7293), (5577, 5627)]