20490355

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 7378829

約数列:

[1, 5, 17, 23, 47, 85, 115, 223, 235, 391, 799, 1081, 1115, 1955, 3791, 3995, 5129, 5405, 10481, 18377, 18955, 25645, 52405, 87193, 91885, 178177, 241063, 435965, 890885, 1205315, 4098071, 20490355]

約数ペア:

[(1, 20490355), (5, 4098071), (17, 1205315), (23, 890885), (47, 435965), (85, 241063), (115, 178177), (223, 91885), (235, 87193), (391, 52405), (799, 25645), (1081, 18955), (1115, 18377), (1955, 10481), (3791, 5405), (3995, 5129)]