2019909100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{18181}}^1$

素因数の和:18307

約数の個数: 72

約数和(自身を含む): 4829284656

約数和(自身を除く): 2809375556

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 101, 110, 202, 220, 275, 404, 505, 550, 1010, 1100, 1111, 2020, 2222, 2525, 4444, 5050, 5555, 10100, 11110, 18181, 22220, 27775, 36362, 55550, 72724, 90905, 111100, 181810, 199991, 363620, 399982, 454525, 799964, 909050, 999955, 1818100, 1836281, 1999910, 3672562, 3999820, 4999775, 7345124, 9181405, 9999550, 18362810, 19999100, 20199091, 36725620, 40398182, 45907025, 80796364, 91814050, 100995455, 183628100, 201990910, 403981820, 504977275, 1009954550, 2019909100]

約数ペア:

[(1, 2019909100), (2, 1009954550), (4, 504977275), (5, 403981820), (10, 201990910), (11, 183628100), (20, 100995455), (22, 91814050), (25, 80796364), (44, 45907025), (50, 40398182), (55, 36725620), (100, 20199091), (101, 19999100), (110, 18362810), (202, 9999550), (220, 9181405), (275, 7345124), (404, 4999775), (505, 3999820), (550, 3672562), (1010, 1999910), (1100, 1836281), (1111, 1818100), (2020, 999955), (2222, 909050), (2525, 799964), (4444, 454525), (5050, 399982), (5555, 363620), (10100, 199991), (11110, 181810), (18181, 111100), (22220, 90905), (27775, 72724), (36362, 55550)]