21465860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82561}}^1$

素因数の和:82583

約数の個数: 24

約数和(自身を含む): 48546456

約数和(自身を除く): 27080596

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82561, 165122, 330244, 412805, 825610, 1073293, 1651220, 2146586, 4293172, 5366465, 10732930, 21465860]

約数ペア:

[(1, 21465860), (2, 10732930), (4, 5366465), (5, 4293172), (10, 2146586), (13, 1651220), (20, 1073293), (26, 825610), (52, 412805), (65, 330244), (130, 165122), (260, 82561)]