18996986

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{5023}}^1$

素因数の和:5117

約数の個数: 16

約数和(自身を含む): 29902848

約数和(自身を除く): 10905862

約数列:

[1, 2, 31, 61, 62, 122, 1891, 3782, 5023, 10046, 155713, 306403, 311426, 612806, 9498493, 18996986]

約数ペア:

[(1, 18996986), (2, 9498493), (31, 612806), (61, 311426), (62, 306403), (122, 155713), (1891, 10046), (3782, 5023)]