21626975

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{337}}^1$

素因数の和:515

約数の個数: 24

約数和(自身を含む): 28667808

約数和(自身を除く): 7040833

約数列:

[1, 5, 17, 25, 85, 151, 337, 425, 755, 1685, 2567, 3775, 5729, 8425, 12835, 28645, 50887, 64175, 143225, 254435, 865079, 1272175, 4325395, 21626975]

約数ペア:

[(1, 21626975), (5, 4325395), (17, 1272175), (25, 865079), (85, 254435), (151, 143225), (337, 64175), (425, 50887), (755, 28645), (1685, 12835), (2567, 8425), (3775, 5729)]