21340520

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{18397}}^1$

素因数の和:18437

約数の個数: 32

約数和(自身を含む): 49674600

約数和(自身を除く): 28334080

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 18397, 36794, 73588, 91985, 147176, 183970, 367940, 533513, 735880, 1067026, 2134052, 2667565, 4268104, 5335130, 10670260, 21340520]

約数ペア:

[(1, 21340520), (2, 10670260), (4, 5335130), (5, 4268104), (8, 2667565), (10, 2134052), (20, 1067026), (29, 735880), (40, 533513), (58, 367940), (116, 183970), (145, 147176), (232, 91985), (290, 73588), (580, 36794), (1160, 18397)]