21389013

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{449}}^1$

素因数の和:601

約数の個数: 24

約数和(自身を含む): 31824000

約数和(自身を除く): 10434987

約数列:

[1, 3, 9, 67, 79, 201, 237, 449, 603, 711, 1347, 4041, 5293, 15879, 30083, 35471, 47637, 90249, 106413, 270747, 319239, 2376557, 7129671, 21389013]

約数ペア:

[(1, 21389013), (3, 7129671), (9, 2376557), (67, 319239), (79, 270747), (201, 106413), (237, 90249), (449, 47637), (603, 35471), (711, 30083), (1347, 15879), (4041, 5293)]