18985425

素因数分解:

$3^1\times 5^2\times {\mathrm{163}}^1\times {\mathrm{1553}}^1$

素因数の和:1729

約数の個数: 24

約数和(自身を含む): 31602144

約数和(自身を除く): 12616719

約数列:

[1, 3, 5, 15, 25, 75, 163, 489, 815, 1553, 2445, 4075, 4659, 7765, 12225, 23295, 38825, 116475, 253139, 759417, 1265695, 3797085, 6328475, 18985425]

約数ペア:

[(1, 18985425), (3, 6328475), (5, 3797085), (15, 1265695), (25, 759417), (75, 253139), (163, 116475), (489, 38825), (815, 23295), (1553, 12225), (2445, 7765), (4075, 4659)]