20781010

素因数分解:

$2^1\times 5^1\times {\mathrm{127}}^1\times {\mathrm{16363}}^1$

素因数の和:16497

約数の個数: 16

約数和(自身を含む): 37702656

約数和(自身を除く): 16921646

約数列:

[1, 2, 5, 10, 127, 254, 635, 1270, 16363, 32726, 81815, 163630, 2078101, 4156202, 10390505, 20781010]

約数ペア:

[(1, 20781010), (2, 10390505), (5, 4156202), (10, 2078101), (127, 163630), (254, 81815), (635, 32726), (1270, 16363)]