21274900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{5189}}^1$

素因数の和:5244

約数の個数: 36

約数和(自身を含む): 47301660

約数和(自身を除く): 26026760

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 5189, 10378, 20756, 25945, 51890, 103780, 129725, 212749, 259450, 425498, 518900, 850996, 1063745, 2127490, 4254980, 5318725, 10637450, 21274900]

約数ペア:

[(1, 21274900), (2, 10637450), (4, 5318725), (5, 4254980), (10, 2127490), (20, 1063745), (25, 850996), (41, 518900), (50, 425498), (82, 259450), (100, 212749), (164, 129725), (205, 103780), (410, 51890), (820, 25945), (1025, 20756), (2050, 10378), (4100, 5189)]