21940455

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{619}}^1$

素因数の和:783

約数の個数: 32

約数和(自身を含む): 37497600

約数和(自身を除く): 15557145

約数列:

[1, 3, 5, 15, 17, 51, 85, 139, 255, 417, 619, 695, 1857, 2085, 2363, 3095, 7089, 9285, 10523, 11815, 31569, 35445, 52615, 86041, 157845, 258123, 430205, 1290615, 1462697, 4388091, 7313485, 21940455]

約数ペア:

[(1, 21940455), (3, 7313485), (5, 4388091), (15, 1462697), (17, 1290615), (51, 430205), (85, 258123), (139, 157845), (255, 86041), (417, 52615), (619, 35445), (695, 31569), (1857, 11815), (2085, 10523), (2363, 9285), (3095, 7089)]