20640168

素因数分解:

$2^3\times 3^2\times {\mathrm{89}}^1\times {\mathrm{3221}}^1$

素因数の和:3322

約数の個数: 48

約数和(自身を含む): 56546100

約数和(自身を除く): 35905932

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 89, 178, 267, 356, 534, 712, 801, 1068, 1602, 2136, 3204, 3221, 6408, 6442, 9663, 12884, 19326, 25768, 28989, 38652, 57978, 77304, 115956, 231912, 286669, 573338, 860007, 1146676, 1720014, 2293352, 2580021, 3440028, 5160042, 6880056, 10320084, 20640168]

約数ペア:

[(1, 20640168), (2, 10320084), (3, 6880056), (4, 5160042), (6, 3440028), (8, 2580021), (9, 2293352), (12, 1720014), (18, 1146676), (24, 860007), (36, 573338), (72, 286669), (89, 231912), (178, 115956), (267, 77304), (356, 57978), (534, 38652), (712, 28989), (801, 25768), (1068, 19326), (1602, 12884), (2136, 9663), (3204, 6442), (3221, 6408)]