18977161

素因数分解:

$7^3\times {\mathrm{61}}^1\times {\mathrm{907}}^1$

素因数の和:989

約数の個数: 16

約数和(自身を含む): 22518400

約数和(自身を除く): 3541239

約数列:

[1, 7, 49, 61, 343, 427, 907, 2989, 6349, 20923, 44443, 55327, 311101, 387289, 2711023, 18977161]

約数ペア:

[(1, 18977161), (7, 2711023), (49, 387289), (61, 311101), (343, 55327), (427, 44443), (907, 20923), (2989, 6349)]