64391540

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:488

約数の個数: 48

約数和(自身を含む): 138184704

約数和(自身を除く): 73793164

約数列:

[1, 2, 4, 5, 10, 20, 101, 127, 202, 251, 254, 404, 502, 505, 508, 635, 1004, 1010, 1255, 1270, 2020, 2510, 2540, 5020, 12827, 25351, 25654, 31877, 50702, 51308, 63754, 64135, 101404, 126755, 127508, 128270, 159385, 253510, 256540, 318770, 507020, 637540, 3219577, 6439154, 12878308, 16097885, 32195770, 64391540]

約数ペア:

[(1, 64391540), (2, 32195770), (4, 16097885), (5, 12878308), (10, 6439154), (20, 3219577), (101, 637540), (127, 507020), (202, 318770), (251, 256540), (254, 253510), (404, 159385), (502, 128270), (505, 127508), (508, 126755), (635, 101404), (1004, 64135), (1010, 63754), (1255, 51308), (1270, 50702), (2020, 31877), (2510, 25654), (2540, 25351), (5020, 12827)]