18989355

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{401}}^1$

素因数の和:468

約数の個数: 64

約数和(自身を含む): 38900736

約数和(自身を除く): 19911381

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 41, 55, 77, 105, 123, 165, 205, 231, 287, 385, 401, 451, 615, 861, 1155, 1203, 1353, 1435, 2005, 2255, 2807, 3157, 4305, 4411, 6015, 6765, 8421, 9471, 13233, 14035, 15785, 16441, 22055, 30877, 42105, 47355, 49323, 66165, 82205, 92631, 115087, 154385, 180851, 246615, 345261, 463155, 542553, 575435, 904255, 1265957, 1726305, 2712765, 3797871, 6329785, 18989355]

約数ペア:

[(1, 18989355), (3, 6329785), (5, 3797871), (7, 2712765), (11, 1726305), (15, 1265957), (21, 904255), (33, 575435), (35, 542553), (41, 463155), (55, 345261), (77, 246615), (105, 180851), (123, 154385), (165, 115087), (205, 92631), (231, 82205), (287, 66165), (385, 49323), (401, 47355), (451, 42105), (615, 30877), (861, 22055), (1155, 16441), (1203, 15785), (1353, 14035), (1435, 13233), (2005, 9471), (2255, 8421), (2807, 6765), (3157, 6015), (4305, 4411)]