20457325

素因数分解:

$5^2\times 7^1\times {\mathrm{29}}^2\times {\mathrm{139}}^1$

素因数の和:214

約数の個数: 36

約数和(自身を含む): 30241120

約数和(自身を除く): 9783795

約数列:

[1, 5, 7, 25, 29, 35, 139, 145, 175, 203, 695, 725, 841, 973, 1015, 3475, 4031, 4205, 4865, 5075, 5887, 20155, 21025, 24325, 28217, 29435, 100775, 116899, 141085, 147175, 584495, 705425, 818293, 2922475, 4091465, 20457325]

約数ペア:

[(1, 20457325), (5, 4091465), (7, 2922475), (25, 818293), (29, 705425), (35, 584495), (139, 147175), (145, 141085), (175, 116899), (203, 100775), (695, 29435), (725, 28217), (841, 24325), (973, 21025), (1015, 20155), (3475, 5887), (4031, 5075), (4205, 4865)]