161656840

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{8231}}^1$

素因数の和:8733

約数の個数: 32

約数和(自身を含む): 364512960

約数和(自身を除く): 202856120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2455, 3928, 4910, 8231, 9820, 16462, 19640, 32924, 41155, 65848, 82310, 164620, 329240, 4041421, 8082842, 16165684, 20207105, 32331368, 40414210, 80828420, 161656840]

約数ペア:

[(1, 161656840), (2, 80828420), (4, 40414210), (5, 32331368), (8, 20207105), (10, 16165684), (20, 8082842), (40, 4041421), (491, 329240), (982, 164620), (1964, 82310), (2455, 65848), (3928, 41155), (4910, 32924), (8231, 19640), (9820, 16462)]