21750003

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{373}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 37340160

約数和(自身を除く): 15590157

約数列:

[1, 3, 9, 11, 19, 31, 33, 57, 93, 99, 171, 209, 279, 341, 373, 589, 627, 1023, 1119, 1767, 1881, 3069, 3357, 4103, 5301, 6479, 7087, 11563, 12309, 19437, 21261, 34689, 36927, 58311, 63783, 77957, 104067, 127193, 219697, 233871, 381579, 659091, 701613, 1144737, 1977273, 2416667, 7250001, 21750003]

約数ペア:

[(1, 21750003), (3, 7250001), (9, 2416667), (11, 1977273), (19, 1144737), (31, 701613), (33, 659091), (57, 381579), (93, 233871), (99, 219697), (171, 127193), (209, 104067), (279, 77957), (341, 63783), (373, 58311), (589, 36927), (627, 34689), (1023, 21261), (1119, 19437), (1767, 12309), (1881, 11563), (3069, 7087), (3357, 6479), (4103, 5301)]