81497660

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239699}}^1$

素因数の和:239725

約数の個数: 24

約数和(自身を含む): 181213200

約数和(自身を除く): 99715540

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 239699, 479398, 958796, 1198495, 2396990, 4074883, 4793980, 8149766, 16299532, 20374415, 40748830, 81497660]

約数ペア:

[(1, 81497660), (2, 40748830), (4, 20374415), (5, 16299532), (10, 8149766), (17, 4793980), (20, 4074883), (34, 2396990), (68, 1198495), (85, 958796), (170, 479398), (340, 239699)]