19865090

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{571}}^1$

素因数の和:663

約数の個数: 48

約数和(自身を含む): 42254784

約数和(自身を除く): 22389694

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 71, 98, 142, 245, 355, 490, 497, 571, 710, 994, 1142, 2485, 2855, 3479, 3997, 4970, 5710, 6958, 7994, 17395, 19985, 27979, 34790, 39970, 40541, 55958, 81082, 139895, 202705, 279790, 283787, 405410, 567574, 1418935, 1986509, 2837870, 3973018, 9932545, 19865090]

約数ペア:

[(1, 19865090), (2, 9932545), (5, 3973018), (7, 2837870), (10, 1986509), (14, 1418935), (35, 567574), (49, 405410), (70, 283787), (71, 279790), (98, 202705), (142, 139895), (245, 81082), (355, 55958), (490, 40541), (497, 39970), (571, 34790), (710, 27979), (994, 19985), (1142, 17395), (2485, 7994), (2855, 6958), (3479, 5710), (3997, 4970)]