218210840

素因数分解:

$2^3\times 5^1\times {\mathrm{1999}}^1\times {\mathrm{2729}}^1$

素因数の和:4739

約数の個数: 32

約数和(自身を含む): 491400000

約数和(自身を除く): 273189160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1999, 2729, 3998, 5458, 7996, 9995, 10916, 13645, 15992, 19990, 21832, 27290, 39980, 54580, 79960, 109160, 5455271, 10910542, 21821084, 27276355, 43642168, 54552710, 109105420, 218210840]

約数ペア:

[(1, 218210840), (2, 109105420), (4, 54552710), (5, 43642168), (8, 27276355), (10, 21821084), (20, 10910542), (40, 5455271), (1999, 109160), (2729, 79960), (3998, 54580), (5458, 39980), (7996, 27290), (9995, 21832), (10916, 19990), (13645, 15992)]