19999100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{18181}}^1$

素因数の和:18206

約数の個数: 36

約数和(自身を含む): 47345928

約数和(自身を除く): 27346828

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 220, 275, 550, 1100, 18181, 36362, 72724, 90905, 181810, 199991, 363620, 399982, 454525, 799964, 909050, 999955, 1818100, 1999910, 3999820, 4999775, 9999550, 19999100]

約数ペア:

[(1, 19999100), (2, 9999550), (4, 4999775), (5, 3999820), (10, 1999910), (11, 1818100), (20, 999955), (22, 909050), (25, 799964), (44, 454525), (50, 399982), (55, 363620), (100, 199991), (110, 181810), (220, 90905), (275, 72724), (550, 36362), (1100, 18181)]