20389971

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{31321}}^1$

素因数の和:31362

約数の個数: 16

約数和(自身を含む): 32073728

約数和(自身を除く): 11683757

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 31321, 93963, 219247, 657741, 970951, 2912853, 6796657, 20389971]

約数ペア:

[(1, 20389971), (3, 6796657), (7, 2912853), (21, 970951), (31, 657741), (93, 219247), (217, 93963), (651, 31321)]