19787860

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{313}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 43520400

約数和(自身を除く): 23732540

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 109, 116, 145, 218, 290, 313, 436, 545, 580, 626, 1090, 1252, 1565, 2180, 3130, 3161, 6260, 6322, 9077, 12644, 15805, 18154, 31610, 34117, 36308, 45385, 63220, 68234, 90770, 136468, 170585, 181540, 341170, 682340, 989393, 1978786, 3957572, 4946965, 9893930, 19787860]

約数ペア:

[(1, 19787860), (2, 9893930), (4, 4946965), (5, 3957572), (10, 1978786), (20, 989393), (29, 682340), (58, 341170), (109, 181540), (116, 170585), (145, 136468), (218, 90770), (290, 68234), (313, 63220), (436, 45385), (545, 36308), (580, 34117), (626, 31610), (1090, 18154), (1252, 15805), (1565, 12644), (2180, 9077), (3130, 6322), (3161, 6260)]