20215.00000000

素因数分解:

$2^2\times 3^2\times {\mathrm{1487219}}^1$

素因数の和:1487229

約数の個数: 18

約数和(自身を含む): 135337020

約数和(自身を除く): 81797136

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 1487219, 2974438, 4461657, 5948876, 8923314, 13384971, 17846628, 26769942, 53539884]

約数ペア:

[(1, 53539884), (2, 26769942), (3, 17846628), (4, 13384971), (6, 8923314), (9, 5948876), (12, 4461657), (18, 2974438), (36, 1487219)]