20650021

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{251}}^1$

素因数の和:361

約数の個数: 24

約数和(自身を含む): 25510464

約数和(自身を除く): 4860443

約数列:

[1, 7, 23, 49, 73, 161, 251, 511, 1127, 1679, 1757, 3577, 5773, 11753, 12299, 18323, 40411, 82271, 128261, 282877, 421429, 897827, 2950003, 20650021]

約数ペア:

[(1, 20650021), (7, 2950003), (23, 897827), (49, 421429), (73, 282877), (161, 128261), (251, 82271), (511, 40411), (1127, 18323), (1679, 12299), (1757, 11753), (3577, 5773)]