21439880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6961}}^1$

素因数の和:6990

約数の個数: 64

約数和(自身を含む): 60151680

約数和(自身を除く): 38711800

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 220, 280, 308, 385, 440, 616, 770, 1540, 3080, 6961, 13922, 27844, 34805, 48727, 55688, 69610, 76571, 97454, 139220, 153142, 194908, 243635, 278440, 306284, 382855, 389816, 487270, 535997, 612568, 765710, 974540, 1071994, 1531420, 1949080, 2143988, 2679985, 3062840, 4287976, 5359970, 10719940, 21439880]

約数ペア:

[(1, 21439880), (2, 10719940), (4, 5359970), (5, 4287976), (7, 3062840), (8, 2679985), (10, 2143988), (11, 1949080), (14, 1531420), (20, 1071994), (22, 974540), (28, 765710), (35, 612568), (40, 535997), (44, 487270), (55, 389816), (56, 382855), (70, 306284), (77, 278440), (88, 243635), (110, 194908), (140, 153142), (154, 139220), (220, 97454), (280, 76571), (308, 69610), (385, 55688), (440, 48727), (616, 34805), (770, 27844), (1540, 13922), (3080, 6961)]