21247160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1123}}^1$

素因数の和:1188

約数の個数: 64

約数和(自身を含む): 53412480

約数和(自身を除く): 32165320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1123, 1720, 1892, 2246, 2365, 3784, 4492, 4730, 5615, 8984, 9460, 11230, 12353, 18920, 22460, 24706, 44920, 48289, 49412, 61765, 96578, 98824, 123530, 193156, 241445, 247060, 386312, 482890, 494120, 531179, 965780, 1062358, 1931560, 2124716, 2655895, 4249432, 5311790, 10623580, 21247160]

約数ペア:

[(1, 21247160), (2, 10623580), (4, 5311790), (5, 4249432), (8, 2655895), (10, 2124716), (11, 1931560), (20, 1062358), (22, 965780), (40, 531179), (43, 494120), (44, 482890), (55, 386312), (86, 247060), (88, 241445), (110, 193156), (172, 123530), (215, 98824), (220, 96578), (344, 61765), (430, 49412), (440, 48289), (473, 44920), (860, 24706), (946, 22460), (1123, 18920), (1720, 12353), (1892, 11230), (2246, 9460), (2365, 8984), (3784, 5615), (4492, 4730)]