20625440

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11719}}^1$

素因数の和:11745

約数の個数: 48

約数和(自身を含む): 53161920

約数和(自身を除く): 32536480

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11719, 23438, 46876, 58595, 93752, 117190, 128909, 187504, 234380, 257818, 375008, 468760, 515636, 644545, 937520, 1031272, 1289090, 1875040, 2062544, 2578180, 4125088, 5156360, 10312720, 20625440]

約数ペア:

[(1, 20625440), (2, 10312720), (4, 5156360), (5, 4125088), (8, 2578180), (10, 2062544), (11, 1875040), (16, 1289090), (20, 1031272), (22, 937520), (32, 644545), (40, 515636), (44, 468760), (55, 375008), (80, 257818), (88, 234380), (110, 187504), (160, 128909), (176, 117190), (220, 93752), (352, 58595), (440, 46876), (880, 23438), (1760, 11719)]