21202225

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:238

約数の個数: 36

約数和(自身を含む): 29751568

約数和(自身を除く): 8549343

約数列:

[1, 5, 11, 25, 43, 55, 121, 163, 215, 275, 473, 605, 815, 1075, 1793, 2365, 3025, 4075, 5203, 7009, 8965, 11825, 19723, 26015, 35045, 44825, 77099, 98615, 130075, 175225, 385495, 493075, 848089, 1927475, 4240445, 21202225]

約数ペア:

[(1, 21202225), (5, 4240445), (11, 1927475), (25, 848089), (43, 493075), (55, 385495), (121, 175225), (163, 130075), (215, 98615), (275, 77099), (473, 44825), (605, 35045), (815, 26015), (1075, 19723), (1793, 11825), (2365, 8965), (3025, 7009), (4075, 5203)]