64637980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{2909}}^1$

素因数の和:3030

約数の個数: 48

約数和(自身を含む): 149597280

約数和(自身を除く): 84959300

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 1010, 1111, 2020, 2222, 2909, 4444, 5555, 5818, 11110, 11636, 14545, 22220, 29090, 31999, 58180, 63998, 127996, 159995, 293809, 319990, 587618, 639980, 1175236, 1469045, 2938090, 3231899, 5876180, 6463798, 12927596, 16159495, 32318990, 64637980]

約数ペア:

[(1, 64637980), (2, 32318990), (4, 16159495), (5, 12927596), (10, 6463798), (11, 5876180), (20, 3231899), (22, 2938090), (44, 1469045), (55, 1175236), (101, 639980), (110, 587618), (202, 319990), (220, 293809), (404, 159995), (505, 127996), (1010, 63998), (1111, 58180), (2020, 31999), (2222, 29090), (2909, 22220), (4444, 14545), (5555, 11636), (5818, 11110)]