12918280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{7877}}^1$

素因数の和:7929

約数の個数: 32

約数和(自身を含む): 29778840

約数和(自身を除く): 16860560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 7877, 15754, 31508, 39385, 63016, 78770, 157540, 315080, 322957, 645914, 1291828, 1614785, 2583656, 3229570, 6459140, 12918280]

約数ペア:

[(1, 12918280), (2, 6459140), (4, 3229570), (5, 2583656), (8, 1614785), (10, 1291828), (20, 645914), (40, 322957), (41, 315080), (82, 157540), (164, 78770), (205, 63016), (328, 39385), (410, 31508), (820, 15754), (1640, 7877)]