20402525

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{439}}^1$

素因数の和:486

約数の個数: 36

約数和(自身を含む): 29953440

約数和(自身を除く): 9550915

約数列:

[1, 5, 11, 13, 25, 55, 65, 143, 169, 275, 325, 439, 715, 845, 1859, 2195, 3575, 4225, 4829, 5707, 9295, 10975, 24145, 28535, 46475, 62777, 74191, 120725, 142675, 313885, 370955, 816101, 1569425, 1854775, 4080505, 20402525]

約数ペア:

[(1, 20402525), (5, 4080505), (11, 1854775), (13, 1569425), (25, 816101), (55, 370955), (65, 313885), (143, 142675), (169, 120725), (275, 74191), (325, 62777), (439, 46475), (715, 28535), (845, 24145), (1859, 10975), (2195, 9295), (3575, 5707), (4225, 4829)]