20399864

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2459}}^1$

素因数の和:2543

約数の個数: 32

約数和(自身を含む): 41180400

約数和(自身を除く): 20780536

約数列:

[1, 2, 4, 8, 17, 34, 61, 68, 122, 136, 244, 488, 1037, 2074, 2459, 4148, 4918, 8296, 9836, 19672, 41803, 83606, 149999, 167212, 299998, 334424, 599996, 1199992, 2549983, 5099966, 10199932, 20399864]

約数ペア:

[(1, 20399864), (2, 10199932), (4, 5099966), (8, 2549983), (17, 1199992), (34, 599996), (61, 334424), (68, 299998), (122, 167212), (136, 149999), (244, 83606), (488, 41803), (1037, 19672), (2074, 9836), (2459, 8296), (4148, 4918)]