18874009

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{7907}}^1$

素因数の和:7956

約数の個数: 16

約数和(自身を含む): 24293376

約数和(自身を除く): 5419367

約数列:

[1, 7, 11, 31, 77, 217, 341, 2387, 7907, 55349, 86977, 245117, 608839, 1715819, 2696287, 18874009]

約数ペア:

[(1, 18874009), (7, 2696287), (11, 1715819), (31, 608839), (77, 245117), (217, 86977), (341, 55349), (2387, 7907)]