64216840

素因数分解:

$2^3\times 5^1\times {\mathrm{1605421}}^1$

素因数の和:1605432

約数の個数: 16

約数和(自身を含む): 144487980

約数和(自身を除く): 80271140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1605421, 3210842, 6421684, 8027105, 12843368, 16054210, 32108420, 64216840]

約数ペア:

[(1, 64216840), (2, 32108420), (4, 16054210), (5, 12843368), (8, 8027105), (10, 6421684), (20, 3210842), (40, 1605421)]