19943775

素因数分解:

$3^2\times 5^2\times {\mathrm{137}}^1\times {\mathrm{647}}^1$

素因数の和:800

約数の個数: 36

約数和(自身を含む): 36037872

約数和(自身を除く): 16094097

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 137, 225, 411, 647, 685, 1233, 1941, 2055, 3235, 3425, 5823, 6165, 9705, 10275, 16175, 29115, 30825, 48525, 88639, 145575, 265917, 443195, 797751, 1329585, 2215975, 3988755, 6647925, 19943775]

約数ペア:

[(1, 19943775), (3, 6647925), (5, 3988755), (9, 2215975), (15, 1329585), (25, 797751), (45, 443195), (75, 265917), (137, 145575), (225, 88639), (411, 48525), (647, 30825), (685, 29115), (1233, 16175), (1941, 10275), (2055, 9705), (3235, 6165), (3425, 5823)]