81490140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3257}}^1$

素因数の和:3411

約数の個数: 72

約数和(自身を含む): 249041520

約数和(自身を除く): 167551380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 139, 180, 278, 417, 556, 695, 834, 1251, 1390, 1668, 2085, 2502, 2780, 3257, 4170, 5004, 6255, 6514, 8340, 9771, 12510, 13028, 16285, 19542, 25020, 29313, 32570, 39084, 48855, 58626, 65140, 97710, 117252, 146565, 195420, 293130, 452723, 586260, 905446, 1358169, 1810892, 2263615, 2716338, 4074507, 4527230, 5432676, 6790845, 8149014, 9054460, 13581690, 16298028, 20372535, 27163380, 40745070, 81490140]

約数ペア:

[(1, 81490140), (2, 40745070), (3, 27163380), (4, 20372535), (5, 16298028), (6, 13581690), (9, 9054460), (10, 8149014), (12, 6790845), (15, 5432676), (18, 4527230), (20, 4074507), (30, 2716338), (36, 2263615), (45, 1810892), (60, 1358169), (90, 905446), (139, 586260), (180, 452723), (278, 293130), (417, 195420), (556, 146565), (695, 117252), (834, 97710), (1251, 65140), (1390, 58626), (1668, 48855), (2085, 39084), (2502, 32570), (2780, 29313), (3257, 25020), (4170, 19542), (5004, 16285), (6255, 13028), (6514, 12510), (8340, 9771)]