19763740

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 43352064

約数和(自身を除く): 23588324

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 251, 254, 310, 502, 508, 620, 635, 1004, 1255, 1270, 2510, 2540, 3937, 5020, 7781, 7874, 15562, 15748, 19685, 31124, 31877, 38905, 39370, 63754, 77810, 78740, 127508, 155620, 159385, 318770, 637540, 988187, 1976374, 3952748, 4940935, 9881870, 19763740]

約数ペア:

[(1, 19763740), (2, 9881870), (4, 4940935), (5, 3952748), (10, 1976374), (20, 988187), (31, 637540), (62, 318770), (124, 159385), (127, 155620), (155, 127508), (251, 78740), (254, 77810), (310, 63754), (502, 39370), (508, 38905), (620, 31877), (635, 31124), (1004, 19685), (1255, 15748), (1270, 15562), (2510, 7874), (2540, 7781), (3937, 5020)]