21778815

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{63127}}^1$

素因数の和:63158

約数の個数: 16

約数和(自身を含む): 36361728

約数和(自身を除く): 14582913

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 63127, 189381, 315635, 946905, 1451921, 4355763, 7259605, 21778815]

約数ペア:

[(1, 21778815), (3, 7259605), (5, 4355763), (15, 1451921), (23, 946905), (69, 315635), (115, 189381), (345, 63127)]