21747520

素因数分解:

$2^6\times 5^1\times {\mathrm{67961}}^1$

素因数の和:67978

約数の個数: 28

約数和(自身を含む): 51787044

約数和(自身を除く): 30039524

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67961, 135922, 271844, 339805, 543688, 679610, 1087376, 1359220, 2174752, 2718440, 4349504, 5436880, 10873760, 21747520]

約数ペア:

[(1, 21747520), (2, 10873760), (4, 5436880), (5, 4349504), (8, 2718440), (10, 2174752), (16, 1359220), (20, 1087376), (32, 679610), (40, 543688), (64, 339805), (80, 271844), (160, 135922), (320, 67961)]