20711313

素因数分解:

$3^2\times 7^1\times {\mathrm{521}}^1\times {\mathrm{631}}^1$

素因数の和:1165

約数の個数: 24

約数和(自身を含む): 34310016

約数和(自身を除く): 13598703

約数列:

[1, 3, 7, 9, 21, 63, 521, 631, 1563, 1893, 3647, 4417, 4689, 5679, 10941, 13251, 32823, 39753, 328751, 986253, 2301257, 2958759, 6903771, 20711313]

約数ペア:

[(1, 20711313), (3, 6903771), (7, 2958759), (9, 2301257), (21, 986253), (63, 328751), (521, 39753), (631, 32823), (1563, 13251), (1893, 10941), (3647, 5679), (4417, 4689)]