20720440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39847}}^1$

素因数の和:39871

約数の個数: 32

約数和(自身を含む): 50208480

約数和(自身を除く): 29488040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39847, 79694, 159388, 199235, 318776, 398470, 518011, 796940, 1036022, 1593880, 2072044, 2590055, 4144088, 5180110, 10360220, 20720440]

約数ペア:

[(1, 20720440), (2, 10360220), (4, 5180110), (5, 4144088), (8, 2590055), (10, 2072044), (13, 1593880), (20, 1036022), (26, 796940), (40, 518011), (52, 398470), (65, 318776), (104, 199235), (130, 159388), (260, 79694), (520, 39847)]