21664475

素因数分解:

$5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{2879}}^1$

素因数の和:2939

約数の個数: 24

約数和(自身を含む): 31426560

約数和(自身を除く): 9762085

約数列:

[1, 5, 7, 25, 35, 43, 175, 215, 301, 1075, 1505, 2879, 7525, 14395, 20153, 71975, 100765, 123797, 503825, 618985, 866579, 3094925, 4332895, 21664475]

約数ペア:

[(1, 21664475), (5, 4332895), (7, 3094925), (25, 866579), (35, 618985), (43, 503825), (175, 123797), (215, 100765), (301, 71975), (1075, 20153), (1505, 14395), (2879, 7525)]