21000407035

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^2\times {\mathrm{139}}^1\times {\mathrm{347}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 26781189120

約数和(自身を除く): 5780782085

約数列:

[1, 5, 31, 53, 139, 155, 265, 347, 695, 1643, 1735, 2809, 4309, 7367, 8215, 10757, 14045, 18391, 21545, 36835, 48233, 53785, 87079, 91955, 228377, 241165, 390451, 435395, 570121, 974723, 1141885, 1495223, 1952255, 2556349, 2850605, 4873615, 7476115, 12103981, 12781745, 30216413, 60519905, 79246819, 135486497, 151082065, 396234095, 677432485, 4200081407, 21000407035]

約数ペア:

[(1, 21000407035), (5, 4200081407), (31, 677432485), (53, 396234095), (139, 151082065), (155, 135486497), (265, 79246819), (347, 60519905), (695, 30216413), (1643, 12781745), (1735, 12103981), (2809, 7476115), (4309, 4873615), (7367, 2850605), (8215, 2556349), (10757, 1952255), (14045, 1495223), (18391, 1141885), (21545, 974723), (36835, 570121), (48233, 435395), (53785, 390451), (87079, 241165), (91955, 228377)]