20539825

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1559}}^1$

素因数の和:1617

約数の個数: 24

約数和(自身を含む): 27855360

約数和(自身を除く): 7315535

約数列:

[1, 5, 17, 25, 31, 85, 155, 425, 527, 775, 1559, 2635, 7795, 13175, 26503, 38975, 48329, 132515, 241645, 662575, 821593, 1208225, 4107965, 20539825]

約数ペア:

[(1, 20539825), (5, 4107965), (17, 1208225), (25, 821593), (31, 662575), (85, 241645), (155, 132515), (425, 48329), (527, 38975), (775, 26503), (1559, 13175), (2635, 7795)]