21480940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82619}}^1$

素因数の和:82641

約数の個数: 24

約数和(自身を含む): 48580560

約数和(自身を除く): 27099620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82619, 165238, 330476, 413095, 826190, 1074047, 1652380, 2148094, 4296188, 5370235, 10740470, 21480940]

約数ペア:

[(1, 21480940), (2, 10740470), (4, 5370235), (5, 4296188), (10, 2148094), (13, 1652380), (20, 1074047), (26, 826190), (52, 413095), (65, 330476), (130, 165238), (260, 82619)]