20621925

素因数分解:

$3^3\times 5^2\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:379

約数の個数: 48

約数和(自身を含む): 38330880

約数和(自身を除く): 17708955

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 137, 223, 225, 411, 669, 675, 685, 1115, 1233, 2007, 2055, 3345, 3425, 3699, 5575, 6021, 6165, 10035, 10275, 16725, 18495, 30105, 30551, 30825, 50175, 91653, 92475, 150525, 152755, 274959, 458265, 763775, 824877, 1374795, 2291325, 4124385, 6873975, 20621925]

約数ペア:

[(1, 20621925), (3, 6873975), (5, 4124385), (9, 2291325), (15, 1374795), (25, 824877), (27, 763775), (45, 458265), (75, 274959), (135, 152755), (137, 150525), (223, 92475), (225, 91653), (411, 50175), (669, 30825), (675, 30551), (685, 30105), (1115, 18495), (1233, 16725), (2007, 10275), (2055, 10035), (3345, 6165), (3425, 6021), (3699, 5575)]