20213725

素因数分解:

$5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{569}}^1$

素因数の和:622

約数の個数: 36

約数和(自身を含む): 30215700

約数和(自身を除く): 10001975

約数列:

[1, 5, 7, 25, 29, 35, 49, 145, 175, 203, 245, 569, 725, 1015, 1225, 1421, 2845, 3983, 5075, 7105, 14225, 16501, 19915, 27881, 35525, 82505, 99575, 115507, 139405, 412525, 577535, 697025, 808549, 2887675, 4042745, 20213725]

約数ペア:

[(1, 20213725), (5, 4042745), (7, 2887675), (25, 808549), (29, 697025), (35, 577535), (49, 412525), (145, 139405), (175, 115507), (203, 99575), (245, 82505), (569, 35525), (725, 27881), (1015, 19915), (1225, 16501), (1421, 14225), (2845, 7105), (3983, 5075)]