20687920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23509}}^1$

素因数の和:23533

約数の個数: 40

約数和(自身を含む): 52474320

約数和(自身を除く): 31786400

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23509, 47018, 94036, 117545, 188072, 235090, 258599, 376144, 470180, 517198, 940360, 1034396, 1292995, 1880720, 2068792, 2585990, 4137584, 5171980, 10343960, 20687920]

約数ペア:

[(1, 20687920), (2, 10343960), (4, 5171980), (5, 4137584), (8, 2585990), (10, 2068792), (11, 1880720), (16, 1292995), (20, 1034396), (22, 940360), (40, 517198), (44, 470180), (55, 376144), (80, 258599), (88, 235090), (110, 188072), (176, 117545), (220, 94036), (440, 47018), (880, 23509)]