20320875

素因数分解:

$3^6\times 5^3\times {\mathrm{223}}^1$

素因数の和:256

約数の個数: 56

約数和(自身を含む): 38193792

約数和(自身を除く): 17872917

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 125, 135, 223, 225, 243, 375, 405, 669, 675, 729, 1115, 1125, 1215, 2007, 2025, 3345, 3375, 3645, 5575, 6021, 6075, 10035, 10125, 16725, 18063, 18225, 27875, 30105, 30375, 50175, 54189, 83625, 90315, 91125, 150525, 162567, 250875, 270945, 451575, 752625, 812835, 1354725, 2257875, 4064175, 6773625, 20320875]

約数ペア:

[(1, 20320875), (3, 6773625), (5, 4064175), (9, 2257875), (15, 1354725), (25, 812835), (27, 752625), (45, 451575), (75, 270945), (81, 250875), (125, 162567), (135, 150525), (223, 91125), (225, 90315), (243, 83625), (375, 54189), (405, 50175), (669, 30375), (675, 30105), (729, 27875), (1115, 18225), (1125, 18063), (1215, 16725), (2007, 10125), (2025, 10035), (3345, 6075), (3375, 6021), (3645, 5575)]