20684279

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 27302400

約数和(自身を除く): 6618121

約数列:

[1, 7, 11, 29, 59, 77, 157, 203, 319, 413, 649, 1099, 1711, 1727, 2233, 4543, 4553, 9263, 11977, 12089, 18821, 31871, 50083, 64841, 101893, 131747, 268627, 350581, 713251, 1880389, 2954897, 20684279]

約数ペア:

[(1, 20684279), (7, 2954897), (11, 1880389), (29, 713251), (59, 350581), (77, 268627), (157, 131747), (203, 101893), (319, 64841), (413, 50083), (649, 31871), (1099, 18821), (1711, 12089), (1727, 11977), (2233, 9263), (4543, 4553)]