18809777

素因数分解:

$7^3\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:142

約数の個数: 32

約数和(自身を含む): 23808000

約数和(自身を除く): 4998223

約数列:

[1, 7, 29, 31, 49, 61, 203, 217, 343, 427, 899, 1421, 1519, 1769, 1891, 2989, 6293, 9947, 10633, 12383, 13237, 20923, 44051, 54839, 86681, 92659, 308357, 383873, 606767, 648613, 2687111, 18809777]

約数ペア:

[(1, 18809777), (7, 2687111), (29, 648613), (31, 606767), (49, 383873), (61, 308357), (203, 92659), (217, 86681), (343, 54839), (427, 44051), (899, 20923), (1421, 13237), (1519, 12383), (1769, 10633), (1891, 9947), (2989, 6293)]