19781906

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{2113}}^1$

素因数の和:2297

約数の個数: 16

約数和(自身を含む): 30847488

約数和(自身を除く): 11065582

約数列:

[1, 2, 31, 62, 151, 302, 2113, 4226, 4681, 9362, 65503, 131006, 319063, 638126, 9890953, 19781906]

約数ペア:

[(1, 19781906), (2, 9890953), (31, 638126), (62, 319063), (151, 131006), (302, 65503), (2113, 9362), (4226, 4681)]