20747780

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{7919}}^1$

素因数の和:8059

約数の個数: 24

約数和(自身を含む): 43908480

約数和(自身を除く): 23160700

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 7919, 15838, 31676, 39595, 79190, 158380, 1037389, 2074778, 4149556, 5186945, 10373890, 20747780]

約数ペア:

[(1, 20747780), (2, 10373890), (4, 5186945), (5, 4149556), (10, 2074778), (20, 1037389), (131, 158380), (262, 79190), (524, 39595), (655, 31676), (1310, 15838), (2620, 7919)]