20520275

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{911}}^1$

素因数の和:991

約数の個数: 24

約数和(自身を含む): 27480384

約数和(自身を除く): 6960109

約数列:

[1, 5, 17, 25, 53, 85, 265, 425, 901, 911, 1325, 4505, 4555, 15487, 22525, 22775, 48283, 77435, 241415, 387175, 820811, 1207075, 4104055, 20520275]

約数ペア:

[(1, 20520275), (5, 4104055), (17, 1207075), (25, 820811), (53, 387175), (85, 241415), (265, 77435), (425, 48283), (901, 22775), (911, 22525), (1325, 15487), (4505, 4555)]