21306145

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{269}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 30689280

約数和(自身を除く): 9383135

約数列:

[1, 5, 7, 31, 35, 73, 155, 217, 269, 365, 511, 1085, 1345, 1883, 2263, 2555, 8339, 9415, 11315, 15841, 19637, 41695, 58373, 79205, 98185, 137459, 291865, 608747, 687295, 3043735, 4261229, 21306145]

約数ペア:

[(1, 21306145), (5, 4261229), (7, 3043735), (31, 687295), (35, 608747), (73, 291865), (155, 137459), (217, 98185), (269, 79205), (365, 58373), (511, 41695), (1085, 19637), (1345, 15841), (1883, 11315), (2263, 9415), (2555, 8339)]