19906864

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{449}}^1$

素因数の和:637

約数の個数: 40

約数和(自身を含む): 41180400

約数和(自身を除く): 21273536

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 163, 272, 326, 449, 652, 898, 1304, 1796, 2608, 2771, 3592, 5542, 7184, 7633, 11084, 15266, 22168, 30532, 44336, 61064, 73187, 122128, 146374, 292748, 585496, 1170992, 1244179, 2488358, 4976716, 9953432, 19906864]

約数ペア:

[(1, 19906864), (2, 9953432), (4, 4976716), (8, 2488358), (16, 1244179), (17, 1170992), (34, 585496), (68, 292748), (136, 146374), (163, 122128), (272, 73187), (326, 61064), (449, 44336), (652, 30532), (898, 22168), (1304, 15266), (1796, 11084), (2608, 7633), (2771, 7184), (3592, 5542)]