21512500

素因数分解:

$2^2\times 5^5\times {\mathrm{1721}}^1$

素因数の和:1750

約数の個数: 36

約数和(自身を含む): 47082924

約数和(自身を除く): 25570424

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 1721, 2500, 3125, 3442, 6250, 6884, 8605, 12500, 17210, 34420, 43025, 86050, 172100, 215125, 430250, 860500, 1075625, 2151250, 4302500, 5378125, 10756250, 21512500]

約数ペア:

[(1, 21512500), (2, 10756250), (4, 5378125), (5, 4302500), (10, 2151250), (20, 1075625), (25, 860500), (50, 430250), (100, 215125), (125, 172100), (250, 86050), (500, 43025), (625, 34420), (1250, 17210), (1721, 12500), (2500, 8605), (3125, 6884), (3442, 6250)]