21250611880

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{205837}}^1$

素因数の和:205966

約数の個数: 64

約数和(自身を含む): 50018634000

約数和(自身を除く): 28768022120

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 89, 116, 145, 178, 232, 290, 356, 445, 580, 712, 890, 1160, 1780, 2581, 3560, 5162, 10324, 12905, 20648, 25810, 51620, 103240, 205837, 411674, 823348, 1029185, 1646696, 2058370, 4116740, 5969273, 8233480, 11938546, 18319493, 23877092, 29846365, 36638986, 47754184, 59692730, 73277972, 91597465, 119385460, 146555944, 183194930, 238770920, 366389860, 531265297, 732779720, 1062530594, 2125061188, 2656326485, 4250122376, 5312652970, 10625305940, 21250611880]

約数ペア:

[(1, 21250611880), (2, 10625305940), (4, 5312652970), (5, 4250122376), (8, 2656326485), (10, 2125061188), (20, 1062530594), (29, 732779720), (40, 531265297), (58, 366389860), (89, 238770920), (116, 183194930), (145, 146555944), (178, 119385460), (232, 91597465), (290, 73277972), (356, 59692730), (445, 47754184), (580, 36638986), (712, 29846365), (890, 23877092), (1160, 18319493), (1780, 11938546), (2581, 8233480), (3560, 5969273), (5162, 4116740), (10324, 2058370), (12905, 1646696), (20648, 1029185), (25810, 823348), (51620, 411674), (103240, 205837)]