21397150

素因数分解:

$2^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{5417}}^1$

素因数の和:5508

約数の個数: 24

約数和(自身を含む): 40309920

約数和(自身を除く): 18912770

約数列:

[1, 2, 5, 10, 25, 50, 79, 158, 395, 790, 1975, 3950, 5417, 10834, 27085, 54170, 135425, 270850, 427943, 855886, 2139715, 4279430, 10698575, 21397150]

約数ペア:

[(1, 21397150), (2, 10698575), (5, 4279430), (10, 2139715), (25, 855886), (50, 427943), (79, 270850), (158, 135425), (395, 54170), (790, 27085), (1975, 10834), (3950, 5417)]