21298100

素因数分解:

$2^2\times 5^2\times {\mathrm{212981}}^1$

素因数の和:212995

約数の個数: 18

約数和(自身を含む): 46217094

約数和(自身を除く): 24918994

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 212981, 425962, 851924, 1064905, 2129810, 4259620, 5324525, 10649050, 21298100]

約数ペア:

[(1, 21298100), (2, 10649050), (4, 5324525), (5, 4259620), (10, 2129810), (20, 1064905), (25, 851924), (50, 425962), (100, 212981)]