81185740

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{181}}^1\times {\mathrm{547}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 175934304

約数和(自身を除く): 94748564

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 181, 205, 362, 410, 547, 724, 820, 905, 1094, 1810, 2188, 2735, 3620, 5470, 7421, 10940, 14842, 22427, 29684, 37105, 44854, 74210, 89708, 99007, 112135, 148420, 198014, 224270, 396028, 448540, 495035, 990070, 1980140, 4059287, 8118574, 16237148, 20296435, 40592870, 81185740]

約数ペア:

[(1, 81185740), (2, 40592870), (4, 20296435), (5, 16237148), (10, 8118574), (20, 4059287), (41, 1980140), (82, 990070), (164, 495035), (181, 448540), (205, 396028), (362, 224270), (410, 198014), (547, 148420), (724, 112135), (820, 99007), (905, 89708), (1094, 74210), (1810, 44854), (2188, 37105), (2735, 29684), (3620, 22427), (5470, 14842), (7421, 10940)]