25641520

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1627}}^1$

素因数の和:1837

約数の個数: 40

約数和(自身を含む): 59955984

約数和(自身を除く): 34314464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1627, 1970, 3152, 3254, 3940, 6508, 7880, 8135, 13016, 15760, 16270, 26032, 32540, 65080, 130160, 320519, 641038, 1282076, 1602595, 2564152, 3205190, 5128304, 6410380, 12820760, 25641520]

約数ペア:

[(1, 25641520), (2, 12820760), (4, 6410380), (5, 5128304), (8, 3205190), (10, 2564152), (16, 1602595), (20, 1282076), (40, 641038), (80, 320519), (197, 130160), (394, 65080), (788, 32540), (985, 26032), (1576, 16270), (1627, 15760), (1970, 13016), (3152, 8135), (3254, 7880), (3940, 6508)]