90643640

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{11503}}^1$

素因数の和:11711

約数の個数: 32

約数和(自身を含む): 205001280

約数和(自身を除く): 114357640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 7880, 11503, 23006, 46012, 57515, 92024, 115030, 230060, 460120, 2266091, 4532182, 9064364, 11330455, 18128728, 22660910, 45321820, 90643640]

約数ペア:

[(1, 90643640), (2, 45321820), (4, 22660910), (5, 18128728), (8, 11330455), (10, 9064364), (20, 4532182), (40, 2266091), (197, 460120), (394, 230060), (788, 115030), (985, 92024), (1576, 57515), (1970, 46012), (3940, 23006), (7880, 11503)]