21157335

素因数分解:

$3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{2957}}^1$

素因数の和:3024

約数の個数: 32

約数和(自身を含む): 38335680

約数和(自身を除く): 17178345

約数列:

[1, 3, 5, 9, 15, 27, 45, 53, 135, 159, 265, 477, 795, 1431, 2385, 2957, 7155, 8871, 14785, 26613, 44355, 79839, 133065, 156721, 399195, 470163, 783605, 1410489, 2350815, 4231467, 7052445, 21157335]

約数ペア:

[(1, 21157335), (3, 7052445), (5, 4231467), (9, 2350815), (15, 1410489), (27, 783605), (45, 470163), (53, 399195), (135, 156721), (159, 133065), (265, 79839), (477, 44355), (795, 26613), (1431, 14785), (2385, 8871), (2957, 7155)]