21398025

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{701}}^1$

素因数の和:762

約数の個数: 48

約数和(自身を含む): 39693888

約数和(自身を除く): 18295863

約数列:

[1, 3, 5, 11, 15, 25, 33, 37, 55, 75, 111, 165, 185, 275, 407, 555, 701, 825, 925, 1221, 2035, 2103, 2775, 3505, 6105, 7711, 10175, 10515, 17525, 23133, 25937, 30525, 38555, 52575, 77811, 115665, 129685, 192775, 285307, 389055, 578325, 648425, 855921, 1426535, 1945275, 4279605, 7132675, 21398025]

約数ペア:

[(1, 21398025), (3, 7132675), (5, 4279605), (11, 1945275), (15, 1426535), (25, 855921), (33, 648425), (37, 578325), (55, 389055), (75, 285307), (111, 192775), (165, 129685), (185, 115665), (275, 77811), (407, 52575), (555, 38555), (701, 30525), (825, 25937), (925, 23133), (1221, 17525), (2035, 10515), (2103, 10175), (2775, 7711), (3505, 6105)]