21000978825

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{186551}}^1$

素因数の和:186662

約数の個数: 48

約数和(自身を含む): 37011916800

約数和(自身を除く): 16010937975

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 79, 95, 237, 285, 395, 475, 1185, 1425, 1501, 1975, 4503, 5925, 7505, 22515, 37525, 112575, 186551, 559653, 932755, 2798265, 3544469, 4663775, 10633407, 13991325, 14737529, 17722345, 44212587, 53167035, 73687645, 88611725, 221062935, 265835175, 280013051, 368438225, 840039153, 1105314675, 1400065255, 4200195765, 7000326275, 21000978825]

約数ペア:

[(1, 21000978825), (3, 7000326275), (5, 4200195765), (15, 1400065255), (19, 1105314675), (25, 840039153), (57, 368438225), (75, 280013051), (79, 265835175), (95, 221062935), (237, 88611725), (285, 73687645), (395, 53167035), (475, 44212587), (1185, 17722345), (1425, 14737529), (1501, 13991325), (1975, 10633407), (4503, 4663775), (5925, 3544469), (7505, 2798265), (22515, 932755), (37525, 559653), (112575, 186551)]