81259540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^2\times {\mathrm{2417}}^1$

素因数の和:2508

約数の個数: 36

約数和(自身を含む): 174980988

約数和(自身を除く): 93721448

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 1681, 2417, 3362, 4834, 6724, 8405, 9668, 12085, 16810, 24170, 33620, 48340, 99097, 198194, 396388, 495485, 990970, 1981940, 4062977, 8125954, 16251908, 20314885, 40629770, 81259540]

約数ペア:

[(1, 81259540), (2, 40629770), (4, 20314885), (5, 16251908), (10, 8125954), (20, 4062977), (41, 1981940), (82, 990970), (164, 495485), (205, 396388), (410, 198194), (820, 99097), (1681, 48340), (2417, 33620), (3362, 24170), (4834, 16810), (6724, 12085), (8405, 9668)]