20971125

素因数分解:

$3^2\times 5^3\times 7^1\times {\mathrm{2663}}^1$

素因数の和:2691

約数の個数: 48

約数和(自身を含む): 43220736

約数和(自身を除く): 22249611

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 125, 175, 225, 315, 375, 525, 875, 1125, 1575, 2625, 2663, 7875, 7989, 13315, 18641, 23967, 39945, 55923, 66575, 93205, 119835, 167769, 199725, 279615, 332875, 466025, 599175, 838845, 998625, 1398075, 2330125, 2995875, 4194225, 6990375, 20971125]

約数ペア:

[(1, 20971125), (3, 6990375), (5, 4194225), (7, 2995875), (9, 2330125), (15, 1398075), (21, 998625), (25, 838845), (35, 599175), (45, 466025), (63, 332875), (75, 279615), (105, 199725), (125, 167769), (175, 119835), (225, 93205), (315, 66575), (375, 55923), (525, 39945), (875, 23967), (1125, 18641), (1575, 13315), (2625, 7989), (2663, 7875)]