81037775

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{199}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 124992000

約数和(自身を除く): 43954225

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 179, 199, 325, 455, 895, 995, 1253, 1393, 2275, 2327, 2587, 4475, 4975, 6265, 6965, 11635, 12935, 16289, 18109, 31325, 34825, 35621, 58175, 64675, 81445, 90545, 178105, 249347, 407225, 452725, 463073, 890525, 1246735, 2315365, 3241511, 6233675, 11576825, 16207555, 81037775]

約数ペア:

[(1, 81037775), (5, 16207555), (7, 11576825), (13, 6233675), (25, 3241511), (35, 2315365), (65, 1246735), (91, 890525), (175, 463073), (179, 452725), (199, 407225), (325, 249347), (455, 178105), (895, 90545), (995, 81445), (1253, 64675), (1393, 58175), (2275, 35621), (2327, 34825), (2587, 31325), (4475, 18109), (4975, 16289), (6265, 12935), (6965, 11635)]