138216405

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{421}}^1\times {\mathrm{509}}^1$

素因数の和:981

約数の個数: 32

約数和(自身を含む): 227272320

約数和(自身を除く): 89055915

約数列:

[1, 3, 5, 15, 43, 129, 215, 421, 509, 645, 1263, 1527, 2105, 2545, 6315, 7635, 18103, 21887, 54309, 65661, 90515, 109435, 214289, 271545, 328305, 642867, 1071445, 3214335, 9214427, 27643281, 46072135, 138216405]

約数ペア:

[(1, 138216405), (3, 46072135), (5, 27643281), (15, 9214427), (43, 3214335), (129, 1071445), (215, 642867), (421, 328305), (509, 271545), (645, 214289), (1263, 109435), (1527, 90515), (2105, 65661), (2545, 54309), (6315, 21887), (7635, 18103)]