20405565

素因数分解:

$3^2\times 5^1\times {\mathrm{467}}^1\times {\mathrm{971}}^1$

素因数の和:1449

約数の個数: 24

約数和(自身を含む): 35481888

約数和(自身を除く): 15076323

約数列:

[1, 3, 5, 9, 15, 45, 467, 971, 1401, 2335, 2913, 4203, 4855, 7005, 8739, 14565, 21015, 43695, 453457, 1360371, 2267285, 4081113, 6801855, 20405565]

約数ペア:

[(1, 20405565), (3, 6801855), (5, 4081113), (9, 2267285), (15, 1360371), (45, 453457), (467, 43695), (971, 21015), (1401, 14565), (2335, 8739), (2913, 7005), (4203, 4855)]