2018201980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{907}}^1\times {\mathrm{1567}}^1$

素因数の和:2554

約数の個数: 48

約数和(自身を含む): 4305401856

約数和(自身を除く): 2287199876

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 907, 1420, 1567, 1814, 3134, 3628, 4535, 6268, 7835, 9070, 15670, 18140, 31340, 64397, 111257, 128794, 222514, 257588, 321985, 445028, 556285, 643970, 1112570, 1287940, 1421269, 2225140, 2842538, 5685076, 7106345, 14212690, 28425380, 100910099, 201820198, 403640396, 504550495, 1009100990, 2018201980]

約数ペア:

[(1, 2018201980), (2, 1009100990), (4, 504550495), (5, 403640396), (10, 201820198), (20, 100910099), (71, 28425380), (142, 14212690), (284, 7106345), (355, 5685076), (710, 2842538), (907, 2225140), (1420, 1421269), (1567, 1287940), (1814, 1112570), (3134, 643970), (3628, 556285), (4535, 445028), (6268, 321985), (7835, 257588), (9070, 222514), (15670, 128794), (18140, 111257), (31340, 64397)]