19947940

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{211}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 43807680

約数和(自身を除く): 23859740

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 163, 211, 290, 326, 422, 580, 652, 815, 844, 1055, 1630, 2110, 3260, 4220, 4727, 6119, 9454, 12238, 18908, 23635, 24476, 30595, 34393, 47270, 61190, 68786, 94540, 122380, 137572, 171965, 343930, 687860, 997397, 1994794, 3989588, 4986985, 9973970, 19947940]

約数ペア:

[(1, 19947940), (2, 9973970), (4, 4986985), (5, 3989588), (10, 1994794), (20, 997397), (29, 687860), (58, 343930), (116, 171965), (145, 137572), (163, 122380), (211, 94540), (290, 68786), (326, 61190), (422, 47270), (580, 34393), (652, 30595), (815, 24476), (844, 23635), (1055, 18908), (1630, 12238), (2110, 9454), (3260, 6119), (4220, 4727)]