21105007

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{701}}^1$

素因数の和:759

約数の個数: 32

約数和(自身を含む): 29113344

約数和(自身を除く): 8008337

約数列:

[1, 7, 11, 17, 23, 77, 119, 161, 187, 253, 391, 701, 1309, 1771, 2737, 4301, 4907, 7711, 11917, 16123, 30107, 53977, 83419, 112861, 131087, 177353, 274091, 917609, 1241471, 1918637, 3015001, 21105007]

約数ペア:

[(1, 21105007), (7, 3015001), (11, 1918637), (17, 1241471), (23, 917609), (77, 274091), (119, 177353), (161, 131087), (187, 112861), (253, 83419), (391, 53977), (701, 30107), (1309, 16123), (1771, 11917), (2737, 7711), (4301, 4907)]