21263984

素因数分解:

$2^4\times 7^1\times {\mathrm{373}}^1\times {\mathrm{509}}^1$

素因数の和:897

約数の個数: 40

約数和(自身を含む): 47303520

約数和(自身を除く): 26039536

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 373, 509, 746, 1018, 1492, 2036, 2611, 2984, 3563, 4072, 5222, 5968, 7126, 8144, 10444, 14252, 20888, 28504, 41776, 57008, 189857, 379714, 759428, 1328999, 1518856, 2657998, 3037712, 5315996, 10631992, 21263984]

約数ペア:

[(1, 21263984), (2, 10631992), (4, 5315996), (7, 3037712), (8, 2657998), (14, 1518856), (16, 1328999), (28, 759428), (56, 379714), (112, 189857), (373, 57008), (509, 41776), (746, 28504), (1018, 20888), (1492, 14252), (2036, 10444), (2611, 8144), (2984, 7126), (3563, 5968), (4072, 5222)]