21519520

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{12227}}^1$

素因数の和:12253

約数の個数: 48

約数和(自身を含む): 55466208

約数和(自身を除く): 33946688

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, 12227, 24454, 48908, 61135, 97816, 122270, 134497, 195632, 244540, 268994, 391264, 489080, 537988, 672485, 978160, 1075976, 1344970, 1956320, 2151952, 2689940, 4303904, 5379880, 10759760, 21519520]

約数ペア:

[(1, 21519520), (2, 10759760), (4, 5379880), (5, 4303904), (8, 2689940), (10, 2151952), (11, 1956320), (16, 1344970), (20, 1075976), (22, 978160), (32, 672485), (40, 537988), (44, 489080), (55, 391264), (80, 268994), (88, 244540), (110, 195632), (160, 134497), (176, 122270), (220, 97816), (352, 61135), (440, 48908), (880, 24454), (1760, 12227)]