21350525

素因数分解:

$5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{601}}^1$

素因数の和:654

約数の個数: 36

約数和(自身を含む): 31912020

約数和(自身を除く): 10561495

約数列:

[1, 5, 7, 25, 29, 35, 49, 145, 175, 203, 245, 601, 725, 1015, 1225, 1421, 3005, 4207, 5075, 7105, 15025, 17429, 21035, 29449, 35525, 87145, 105175, 122003, 147245, 435725, 610015, 736225, 854021, 3050075, 4270105, 21350525]

約数ペア:

[(1, 21350525), (5, 4270105), (7, 3050075), (25, 854021), (29, 736225), (35, 610015), (49, 435725), (145, 147245), (175, 122003), (203, 105175), (245, 87145), (601, 35525), (725, 29449), (1015, 21035), (1225, 17429), (1421, 15025), (3005, 7105), (4207, 5075)]