21004865

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{269}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 9477055

約数列:

[1, 5, 7, 23, 35, 97, 115, 161, 269, 485, 679, 805, 1345, 1883, 2231, 3395, 6187, 9415, 11155, 15617, 26093, 30935, 43309, 78085, 130465, 182651, 216545, 600139, 913255, 3000695, 4200973, 21004865]

約数ペア:

[(1, 21004865), (5, 4200973), (7, 3000695), (23, 913255), (35, 600139), (97, 216545), (115, 182651), (161, 130465), (269, 78085), (485, 43309), (679, 30935), (805, 26093), (1345, 15617), (1883, 11155), (2231, 9415), (3395, 6187)]