21483880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{311}}^1$

素因数の和:490

約数の個数: 64

約数和(自身を含む): 53239680

約数和(自身を除く): 31755800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 157, 220, 311, 314, 440, 622, 628, 785, 1244, 1256, 1555, 1570, 1727, 2488, 3110, 3140, 3421, 3454, 6220, 6280, 6842, 6908, 8635, 12440, 13684, 13816, 17105, 17270, 27368, 34210, 34540, 48827, 68420, 69080, 97654, 136840, 195308, 244135, 390616, 488270, 537097, 976540, 1074194, 1953080, 2148388, 2685485, 4296776, 5370970, 10741940, 21483880]

約数ペア:

[(1, 21483880), (2, 10741940), (4, 5370970), (5, 4296776), (8, 2685485), (10, 2148388), (11, 1953080), (20, 1074194), (22, 976540), (40, 537097), (44, 488270), (55, 390616), (88, 244135), (110, 195308), (157, 136840), (220, 97654), (311, 69080), (314, 68420), (440, 48827), (622, 34540), (628, 34210), (785, 27368), (1244, 17270), (1256, 17105), (1555, 13816), (1570, 13684), (1727, 12440), (2488, 8635), (3110, 6908), (3140, 6842), (3421, 6280), (3454, 6220)]