64496840

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{4021}}^1$

素因数の和:4433

約数の個数: 32

約数和(自身を含む): 145515960

約数和(自身を除く): 81019120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 4021, 8020, 8042, 16040, 16084, 20105, 32168, 40210, 80420, 160840, 1612421, 3224842, 6449684, 8062105, 12899368, 16124210, 32248420, 64496840]

約数ペア:

[(1, 64496840), (2, 32248420), (4, 16124210), (5, 12899368), (8, 8062105), (10, 6449684), (20, 3224842), (40, 1612421), (401, 160840), (802, 80420), (1604, 40210), (2005, 32168), (3208, 20105), (4010, 16084), (4021, 16040), (8020, 8042)]