21047865

素因数分解:

$3^1\times 5^1\times {\mathrm{1031}}^1\times {\mathrm{1361}}^1$

素因数の和:2400

約数の個数: 16

約数和(自身を含む): 33734016

約数和(自身を除く): 12686151

約数列:

[1, 3, 5, 15, 1031, 1361, 3093, 4083, 5155, 6805, 15465, 20415, 1403191, 4209573, 7015955, 21047865]

約数ペア:

[(1, 21047865), (3, 7015955), (5, 4209573), (15, 1403191), (1031, 20415), (1361, 15465), (3093, 6805), (4083, 5155)]