21613865

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{709}}^1$

素因数の和:801

約数の個数: 32

約数和(自身を含む): 32444160

約数和(自身を除く): 10830295

約数列:

[1, 5, 7, 13, 35, 65, 67, 91, 335, 455, 469, 709, 871, 2345, 3545, 4355, 4963, 6097, 9217, 24815, 30485, 46085, 47503, 64519, 237515, 322595, 332521, 617539, 1662605, 3087695, 4322773, 21613865]

約数ペア:

[(1, 21613865), (5, 4322773), (7, 3087695), (13, 1662605), (35, 617539), (65, 332521), (67, 322595), (91, 237515), (335, 64519), (455, 47503), (469, 46085), (709, 30485), (871, 24815), (2345, 9217), (3545, 6097), (4355, 4963)]