21371385

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{5501}}^1$

素因数の和:5553

約数の個数: 32

約数和(自身を含む): 40142592

約数和(自身を除く): 18771207

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 105, 111, 185, 259, 555, 777, 1295, 3885, 5501, 16503, 27505, 38507, 82515, 115521, 192535, 203537, 577605, 610611, 1017685, 1424759, 3053055, 4274277, 7123795, 21371385]

約数ペア:

[(1, 21371385), (3, 7123795), (5, 4274277), (7, 3053055), (15, 1424759), (21, 1017685), (35, 610611), (37, 577605), (105, 203537), (111, 192535), (185, 115521), (259, 82515), (555, 38507), (777, 27505), (1295, 16503), (3885, 5501)]