20722911

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{431}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 31850496

約数和(自身を除く): 11127585

約数列:

[1, 3, 11, 31, 33, 47, 93, 141, 341, 431, 517, 1023, 1293, 1457, 1551, 4371, 4741, 13361, 14223, 16027, 20257, 40083, 48081, 60771, 146971, 222827, 440913, 627967, 668481, 1883901, 6907637, 20722911]

約数ペア:

[(1, 20722911), (3, 6907637), (11, 1883901), (31, 668481), (33, 627967), (47, 440913), (93, 222827), (141, 146971), (341, 60771), (431, 48081), (517, 40083), (1023, 20257), (1293, 16027), (1457, 14223), (1551, 13361), (4371, 4741)]