21399255

素因数分解:

$3^3\times 5^1\times {\mathrm{293}}^1\times {\mathrm{541}}^1$

素因数の和:848

約数の個数: 32

約数和(自身を含む): 38243520

約数和(自身を除く): 16844265

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 293, 541, 879, 1465, 1623, 2637, 2705, 4395, 4869, 7911, 8115, 13185, 14607, 24345, 39555, 73035, 158513, 475539, 792565, 1426617, 2377695, 4279851, 7133085, 21399255]

約数ペア:

[(1, 21399255), (3, 7133085), (5, 4279851), (9, 2377695), (15, 1426617), (27, 792565), (45, 475539), (135, 158513), (293, 73035), (541, 39555), (879, 24345), (1465, 14607), (1623, 13185), (2637, 8115), (2705, 7911), (4395, 4869)]