21146120

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1051}}^1$

素因数の和:1565

約数の個数: 32

約数和(自身を含む): 47718720

約数和(自身を除く): 26572600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 1051, 2012, 2102, 2515, 4024, 4204, 5030, 5255, 8408, 10060, 10510, 20120, 21020, 42040, 528653, 1057306, 2114612, 2643265, 4229224, 5286530, 10573060, 21146120]

約数ペア:

[(1, 21146120), (2, 10573060), (4, 5286530), (5, 4229224), (8, 2643265), (10, 2114612), (20, 1057306), (40, 528653), (503, 42040), (1006, 21020), (1051, 20120), (2012, 10510), (2102, 10060), (2515, 8408), (4024, 5255), (4204, 5030)]