20798944

素因数分解:

$2^5\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:275

約数の個数: 48

約数和(自身を含む): 42411600

約数和(自身を除く): 21612656

約数列:

[1, 2, 4, 8, 16, 32, 67, 89, 109, 134, 178, 218, 268, 356, 436, 536, 712, 872, 1072, 1424, 1744, 2144, 2848, 3488, 5963, 7303, 9701, 11926, 14606, 19402, 23852, 29212, 38804, 47704, 58424, 77608, 95408, 116848, 155216, 190816, 233696, 310432, 649967, 1299934, 2599868, 5199736, 10399472, 20798944]

約数ペア:

[(1, 20798944), (2, 10399472), (4, 5199736), (8, 2599868), (16, 1299934), (32, 649967), (67, 310432), (89, 233696), (109, 190816), (134, 155216), (178, 116848), (218, 95408), (268, 77608), (356, 58424), (436, 47704), (536, 38804), (712, 29212), (872, 23852), (1072, 19402), (1424, 14606), (1744, 11926), (2144, 9701), (2848, 7303), (3488, 5963)]