21000643210

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51221081}}^1$

素因数の和:51221129

約数の個数: 16

約数和(自身を含む): 38723137992

約数和(自身を除く): 17722494782

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51221081, 102442162, 256105405, 512210810, 2100064321, 4200128642, 10500321605, 21000643210]

約数ペア:

[(1, 21000643210), (2, 10500321605), (5, 4200128642), (10, 2100064321), (41, 512210810), (82, 256105405), (205, 102442162), (410, 51221081)]