21429400

素因数分解:

$2^3\times 5^2\times {\mathrm{109}}^1\times {\mathrm{983}}^1$

素因数の和:1108

約数の個数: 48

約数和(自身を含む): 50331600

約数和(自身を除く): 28902200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 200, 218, 436, 545, 872, 983, 1090, 1966, 2180, 2725, 3932, 4360, 4915, 5450, 7864, 9830, 10900, 19660, 21800, 24575, 39320, 49150, 98300, 107147, 196600, 214294, 428588, 535735, 857176, 1071470, 2142940, 2678675, 4285880, 5357350, 10714700, 21429400]

約数ペア:

[(1, 21429400), (2, 10714700), (4, 5357350), (5, 4285880), (8, 2678675), (10, 2142940), (20, 1071470), (25, 857176), (40, 535735), (50, 428588), (100, 214294), (109, 196600), (200, 107147), (218, 98300), (436, 49150), (545, 39320), (872, 24575), (983, 21800), (1090, 19660), (1966, 10900), (2180, 9830), (2725, 7864), (3932, 5450), (4360, 4915)]