20405266064

素因数分解:

$2^4\times {\mathrm{811}}^1\times {\mathrm{1572539}}^1$

素因数の和:1573358

約数の個数: 20

約数和(自身を含む): 39583976880

約数和(自身を除く): 19178710816

約数列:

[1, 2, 4, 8, 16, 811, 1622, 3244, 6488, 12976, 1572539, 3145078, 6290156, 12580312, 25160624, 1275329129, 2550658258, 5101316516, 10202633032, 20405266064]

約数ペア:

[(1, 20405266064), (2, 10202633032), (4, 5101316516), (8, 2550658258), (16, 1275329129), (811, 25160624), (1622, 12580312), (3244, 6290156), (6488, 3145078), (12976, 1572539)]