9989991

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 17072640

約数和(自身を除く): 7082649

約数列:

[1, 3, 9, 11, 19, 33, 47, 57, 99, 113, 141, 171, 209, 339, 423, 517, 627, 893, 1017, 1243, 1551, 1881, 2147, 2679, 3729, 4653, 5311, 6441, 8037, 9823, 11187, 15933, 19323, 23617, 29469, 47799, 58421, 70851, 88407, 100909, 175263, 212553, 302727, 525789, 908181, 1109999, 3329997, 9989991]

約数ペア:

[(1, 9989991), (3, 3329997), (9, 1109999), (11, 908181), (19, 525789), (33, 302727), (47, 212553), (57, 175263), (99, 100909), (113, 88407), (141, 70851), (171, 58421), (209, 47799), (339, 29469), (423, 23617), (517, 19323), (627, 15933), (893, 11187), (1017, 9823), (1243, 8037), (1551, 6441), (1881, 5311), (2147, 4653), (2679, 3729)]