20821804

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{7121}}^1$

素因数の和:7185

約数の個数: 24

約数和(自身を含む): 39484368

約数和(自身を除く): 18662564

約数列:

[1, 2, 4, 17, 34, 43, 68, 86, 172, 731, 1462, 2924, 7121, 14242, 28484, 121057, 242114, 306203, 484228, 612406, 1224812, 5205451, 10410902, 20821804]

約数ペア:

[(1, 20821804), (2, 10410902), (4, 5205451), (17, 1224812), (34, 612406), (43, 484228), (68, 306203), (86, 242114), (172, 121057), (731, 28484), (1462, 14242), (2924, 7121)]