20013104

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{257}}^1$

素因数の和:453

約数の個数: 40

約数和(自身を含む): 40437888

約数和(自身を除く): 20424784

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 157, 248, 257, 314, 496, 514, 628, 1028, 1256, 2056, 2512, 4112, 4867, 7967, 9734, 15934, 19468, 31868, 38936, 40349, 63736, 77872, 80698, 127472, 161396, 322792, 645584, 1250819, 2501638, 5003276, 10006552, 20013104]

約数ペア:

[(1, 20013104), (2, 10006552), (4, 5003276), (8, 2501638), (16, 1250819), (31, 645584), (62, 322792), (124, 161396), (157, 127472), (248, 80698), (257, 77872), (314, 63736), (496, 40349), (514, 38936), (628, 31868), (1028, 19468), (1256, 15934), (2056, 9734), (2512, 7967), (4112, 4867)]