845840

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:219

約数の個数: 40

約数和(自身を含む): 2005080

約数和(自身を除く): 1159240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 109, 194, 218, 388, 436, 485, 545, 776, 872, 970, 1090, 1552, 1744, 1940, 2180, 3880, 4360, 7760, 8720, 10573, 21146, 42292, 52865, 84584, 105730, 169168, 211460, 422920, 845840]

約数ペア:

[(1, 845840), (2, 422920), (4, 211460), (5, 169168), (8, 105730), (10, 84584), (16, 52865), (20, 42292), (40, 21146), (80, 10573), (97, 8720), (109, 7760), (194, 4360), (218, 3880), (388, 2180), (436, 1940), (485, 1744), (545, 1552), (776, 1090), (872, 970)]