18818860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{239}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 41287680

約数和(自身を除く): 22468820

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 239, 254, 310, 478, 508, 620, 635, 956, 1195, 1270, 2390, 2540, 3937, 4780, 7409, 7874, 14818, 15748, 19685, 29636, 30353, 37045, 39370, 60706, 74090, 78740, 121412, 148180, 151765, 303530, 607060, 940943, 1881886, 3763772, 4704715, 9409430, 18818860]

約数ペア:

[(1, 18818860), (2, 9409430), (4, 4704715), (5, 3763772), (10, 1881886), (20, 940943), (31, 607060), (62, 303530), (124, 151765), (127, 148180), (155, 121412), (239, 78740), (254, 74090), (310, 60706), (478, 39370), (508, 37045), (620, 30353), (635, 29636), (956, 19685), (1195, 15748), (1270, 14818), (2390, 7874), (2540, 7409), (3937, 4780)]