20403845

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{113}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 31814208

約数和(自身を除く): 11410363

約数列:

[1, 5, 7, 11, 35, 49, 55, 67, 77, 113, 245, 335, 385, 469, 539, 565, 737, 791, 1243, 2345, 2695, 3283, 3685, 3955, 5159, 5537, 6215, 7571, 8701, 16415, 25795, 27685, 36113, 37855, 43505, 52997, 60907, 83281, 180565, 264985, 304535, 370979, 416405, 582967, 1854895, 2914835, 4080769, 20403845]

約数ペア:

[(1, 20403845), (5, 4080769), (7, 2914835), (11, 1854895), (35, 582967), (49, 416405), (55, 370979), (67, 304535), (77, 264985), (113, 180565), (245, 83281), (335, 60907), (385, 52997), (469, 43505), (539, 37855), (565, 36113), (737, 27685), (791, 25795), (1243, 16415), (2345, 8701), (2695, 7571), (3283, 6215), (3685, 5537), (3955, 5159)]