20719040

素因数分解:

$2^6\times 5^1\times {\mathrm{64747}}^1$

素因数の和:64764

約数の個数: 28

約数和(自身を含む): 49337976

約数和(自身を除く): 28618936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 64747, 129494, 258988, 323735, 517976, 647470, 1035952, 1294940, 2071904, 2589880, 4143808, 5179760, 10359520, 20719040]

約数ペア:

[(1, 20719040), (2, 10359520), (4, 5179760), (5, 4143808), (8, 2589880), (10, 2071904), (16, 1294940), (20, 1035952), (32, 647470), (40, 517976), (64, 323735), (80, 258988), (160, 129494), (320, 64747)]