20284775

素因数分解:

$5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{571}}^1$

素因数の和:624

約数の個数: 36

約数和(自身を含む): 30321720

約数和(自身を除く): 10036945

約数列:

[1, 5, 7, 25, 29, 35, 49, 145, 175, 203, 245, 571, 725, 1015, 1225, 1421, 2855, 3997, 5075, 7105, 14275, 16559, 19985, 27979, 35525, 82795, 99925, 115913, 139895, 413975, 579565, 699475, 811391, 2897825, 4056955, 20284775]

約数ペア:

[(1, 20284775), (5, 4056955), (7, 2897825), (25, 811391), (29, 699475), (35, 579565), (49, 413975), (145, 139895), (175, 115913), (203, 99925), (245, 82795), (571, 35525), (725, 27979), (1015, 19985), (1225, 16559), (1421, 14275), (2855, 7105), (3997, 5075)]