20999955

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{10687}}^1$

素因数の和:10826

約数の個数: 16

約数和(自身を含む): 33859584

約数和(自身を除く): 12859629

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 10687, 32061, 53435, 160305, 1399997, 4199991, 6999985, 20999955]

約数ペア:

[(1, 20999955), (3, 6999985), (5, 4199991), (15, 1399997), (131, 160305), (393, 53435), (655, 32061), (1965, 10687)]