20455216

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{479}}^1$

素因数の和:661

約数の個数: 40

約数和(自身を含む): 42318720

約数和(自身を除く): 21863504

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 157, 272, 314, 479, 628, 958, 1256, 1916, 2512, 2669, 3832, 5338, 7664, 8143, 10676, 16286, 21352, 32572, 42704, 65144, 75203, 130288, 150406, 300812, 601624, 1203248, 1278451, 2556902, 5113804, 10227608, 20455216]

約数ペア:

[(1, 20455216), (2, 10227608), (4, 5113804), (8, 2556902), (16, 1278451), (17, 1203248), (34, 601624), (68, 300812), (136, 150406), (157, 130288), (272, 75203), (314, 65144), (479, 42704), (628, 32572), (958, 21352), (1256, 16286), (1916, 10676), (2512, 8143), (2669, 7664), (3832, 5338)]