21253825

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1163}}^1$

素因数の和:1233

約数の個数: 24

約数和(自身を含む): 28578528

約数和(自身を除く): 7324703

約数列:

[1, 5, 17, 25, 43, 85, 215, 425, 731, 1075, 1163, 3655, 5815, 18275, 19771, 29075, 50009, 98855, 250045, 494275, 850153, 1250225, 4250765, 21253825]

約数ペア:

[(1, 21253825), (5, 4250765), (17, 1250225), (25, 850153), (43, 494275), (85, 250045), (215, 98855), (425, 50009), (731, 29075), (1075, 19771), (1163, 18275), (3655, 5815)]