20542120

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1777}}^1$

素因数の和:1822

約数の個数: 48

約数和(自身を含む): 49126140

約数和(自身を除く): 28584020

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1445, 1777, 2312, 2890, 3554, 5780, 7108, 8885, 11560, 14216, 17770, 30209, 35540, 60418, 71080, 120836, 151045, 241672, 302090, 513553, 604180, 1027106, 1208360, 2054212, 2567765, 4108424, 5135530, 10271060, 20542120]

約数ペア:

[(1, 20542120), (2, 10271060), (4, 5135530), (5, 4108424), (8, 2567765), (10, 2054212), (17, 1208360), (20, 1027106), (34, 604180), (40, 513553), (68, 302090), (85, 241672), (136, 151045), (170, 120836), (289, 71080), (340, 60418), (578, 35540), (680, 30209), (1156, 17770), (1445, 14216), (1777, 11560), (2312, 8885), (2890, 7108), (3554, 5780)]