18984903

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 31912704

約数和(自身を除く): 12927801

約数列:

[1, 3, 7, 17, 21, 49, 51, 71, 107, 119, 147, 213, 321, 357, 497, 749, 833, 1207, 1491, 1819, 2247, 2499, 3479, 3621, 5243, 5457, 7597, 8449, 10437, 12733, 15729, 22791, 25347, 38199, 53179, 59143, 89131, 129149, 159537, 177429, 267393, 372253, 387447, 904043, 1116759, 2712129, 6328301, 18984903]

約数ペア:

[(1, 18984903), (3, 6328301), (7, 2712129), (17, 1116759), (21, 904043), (49, 387447), (51, 372253), (71, 267393), (107, 177429), (119, 159537), (147, 129149), (213, 89131), (321, 59143), (357, 53179), (497, 38199), (749, 25347), (833, 22791), (1207, 15729), (1491, 12733), (1819, 10437), (2247, 8449), (2499, 7597), (3479, 5457), (3621, 5243)]