21507520

素因数分解:

$2^6\times 5^1\times {\mathrm{67211}}^1$

素因数の和:67228

約数の個数: 28

約数和(自身を含む): 51215544

約数和(自身を除く): 29708024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67211, 134422, 268844, 336055, 537688, 672110, 1075376, 1344220, 2150752, 2688440, 4301504, 5376880, 10753760, 21507520]

約数ペア:

[(1, 21507520), (2, 10753760), (4, 5376880), (5, 4301504), (8, 2688440), (10, 2150752), (16, 1344220), (20, 1075376), (32, 672110), (40, 537688), (64, 336055), (80, 268844), (160, 134422), (320, 67211)]