20391255

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^2\times {\mathrm{331}}^1$

素因数の和:416

約数の個数: 36

約数和(自身を含む): 36435672

約数和(自身を除く): 16044417

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 331, 333, 555, 993, 1369, 1655, 1665, 2979, 4107, 4965, 6845, 12247, 12321, 14895, 20535, 36741, 61235, 61605, 110223, 183705, 453139, 551115, 1359417, 2265695, 4078251, 6797085, 20391255]

約数ペア:

[(1, 20391255), (3, 6797085), (5, 4078251), (9, 2265695), (15, 1359417), (37, 551115), (45, 453139), (111, 183705), (185, 110223), (331, 61605), (333, 61235), (555, 36741), (993, 20535), (1369, 14895), (1655, 12321), (1665, 12247), (2979, 6845), (4107, 4965)]