81872273

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{179}}^1\times {\mathrm{181}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 99852480

約数和(自身を除く): 17980207

約数列:

[1, 7, 19, 133, 179, 181, 361, 1253, 1267, 2527, 3401, 3439, 23807, 24073, 32399, 64619, 65341, 226793, 452333, 457387, 615581, 4309067, 11696039, 81872273]

約数ペア:

[(1, 81872273), (7, 11696039), (19, 4309067), (133, 615581), (179, 457387), (181, 452333), (361, 226793), (1253, 65341), (1267, 64619), (2527, 32399), (3401, 24073), (3439, 23807)]