21619700

素因数分解:

$2^2\times 5^2\times {\mathrm{103}}^1\times {\mathrm{2099}}^1$

素因数の和:2216

約数の個数: 36

約数和(自身を含む): 47392800

約数和(自身を除く): 25773100

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 103, 206, 412, 515, 1030, 2060, 2099, 2575, 4198, 5150, 8396, 10300, 10495, 20990, 41980, 52475, 104950, 209900, 216197, 432394, 864788, 1080985, 2161970, 4323940, 5404925, 10809850, 21619700]

約数ペア:

[(1, 21619700), (2, 10809850), (4, 5404925), (5, 4323940), (10, 2161970), (20, 1080985), (25, 864788), (50, 432394), (100, 216197), (103, 209900), (206, 104950), (412, 52475), (515, 41980), (1030, 20990), (2060, 10495), (2099, 10300), (2575, 8396), (4198, 5150)]