20647520

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7591}}^1$

素因数の和:7623

約数の個数: 48

約数和(自身を含む): 51655968

約数和(自身を除く): 31008448

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7591, 15182, 30364, 37955, 60728, 75910, 121456, 129047, 151820, 242912, 258094, 303640, 516188, 607280, 645235, 1032376, 1214560, 1290470, 2064752, 2580940, 4129504, 5161880, 10323760, 20647520]

約数ペア:

[(1, 20647520), (2, 10323760), (4, 5161880), (5, 4129504), (8, 2580940), (10, 2064752), (16, 1290470), (17, 1214560), (20, 1032376), (32, 645235), (34, 607280), (40, 516188), (68, 303640), (80, 258094), (85, 242912), (136, 151820), (160, 129047), (170, 121456), (272, 75910), (340, 60728), (544, 37955), (680, 30364), (1360, 15182), (2720, 7591)]