19718560

素因数分解:

$2^5\times 5^1\times {\mathrm{251}}^1\times {\mathrm{491}}^1$

素因数の和:757

約数の個数: 48

約数和(自身を含む): 46865952

約数和(自身を除く): 27147392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 251, 491, 502, 982, 1004, 1255, 1964, 2008, 2455, 2510, 3928, 4016, 4910, 5020, 7856, 8032, 9820, 10040, 15712, 19640, 20080, 39280, 40160, 78560, 123241, 246482, 492964, 616205, 985928, 1232410, 1971856, 2464820, 3943712, 4929640, 9859280, 19718560]

約数ペア:

[(1, 19718560), (2, 9859280), (4, 4929640), (5, 3943712), (8, 2464820), (10, 1971856), (16, 1232410), (20, 985928), (32, 616205), (40, 492964), (80, 246482), (160, 123241), (251, 78560), (491, 40160), (502, 39280), (982, 20080), (1004, 19640), (1255, 15712), (1964, 10040), (2008, 9820), (2455, 8032), (2510, 7856), (3928, 5020), (4016, 4910)]