19997775

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{12697}}^1$

素因数の和:12720

約数の個数: 36

約数和(自身を含む): 40938352

約数和(自身を除く): 20940577

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 175, 225, 315, 525, 1575, 12697, 38091, 63485, 88879, 114273, 190455, 266637, 317425, 444395, 571365, 799911, 952275, 1333185, 2221975, 2856825, 3999555, 6665925, 19997775]

約数ペア:

[(1, 19997775), (3, 6665925), (5, 3999555), (7, 2856825), (9, 2221975), (15, 1333185), (21, 952275), (25, 799911), (35, 571365), (45, 444395), (63, 317425), (75, 266637), (105, 190455), (175, 114273), (225, 88879), (315, 63485), (525, 38091), (1575, 12697)]