20640225

素因数分解:

$3^1\times 5^2\times {\mathrm{149}}^1\times {\mathrm{1847}}^1$

素因数の和:2009

約数の個数: 24

約数和(自身を含む): 34372800

約数和(自身を除く): 13732575

約数列:

[1, 3, 5, 15, 25, 75, 149, 447, 745, 1847, 2235, 3725, 5541, 9235, 11175, 27705, 46175, 138525, 275203, 825609, 1376015, 4128045, 6880075, 20640225]

約数ペア:

[(1, 20640225), (3, 6880075), (5, 4128045), (15, 1376015), (25, 825609), (75, 275203), (149, 138525), (447, 46175), (745, 27705), (1847, 11175), (2235, 9235), (3725, 5541)]