21995001

素因数分解:

$3^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{3203}}^1$

素因数の和:3325

約数の個数: 24

約数和(自身を含む): 36653760

約数和(自身を除く): 14658759

約数列:

[1, 3, 7, 9, 21, 63, 109, 327, 763, 981, 2289, 3203, 6867, 9609, 22421, 28827, 67263, 201789, 349127, 1047381, 2443889, 3142143, 7331667, 21995001]

約数ペア:

[(1, 21995001), (3, 7331667), (7, 3142143), (9, 2443889), (21, 1047381), (63, 349127), (109, 201789), (327, 67263), (763, 28827), (981, 22421), (2289, 9609), (3203, 6867)]