81406808

素因数分解:

$2^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{389}}^1$

素因数の和:540

約数の個数: 64

約数和(自身を含む): 181396800

約数和(自身を除く): 99989992

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 56, 74, 101, 148, 202, 259, 296, 389, 404, 518, 707, 778, 808, 1036, 1414, 1556, 2072, 2723, 2828, 3112, 3737, 5446, 5656, 7474, 10892, 14393, 14948, 21784, 26159, 28786, 29896, 39289, 52318, 57572, 78578, 100751, 104636, 115144, 157156, 201502, 209272, 275023, 314312, 403004, 550046, 806008, 1100092, 1453693, 2200184, 2907386, 5814772, 10175851, 11629544, 20351702, 40703404, 81406808]

約数ペア:

[(1, 81406808), (2, 40703404), (4, 20351702), (7, 11629544), (8, 10175851), (14, 5814772), (28, 2907386), (37, 2200184), (56, 1453693), (74, 1100092), (101, 806008), (148, 550046), (202, 403004), (259, 314312), (296, 275023), (389, 209272), (404, 201502), (518, 157156), (707, 115144), (778, 104636), (808, 100751), (1036, 78578), (1414, 57572), (1556, 52318), (2072, 39289), (2723, 29896), (2828, 28786), (3112, 26159), (3737, 21784), (5446, 14948), (5656, 14393), (7474, 10892)]