20705120

素因数分解:

$2^5\times 5^1\times {\mathrm{151}}^1\times {\mathrm{857}}^1$

素因数の和:1023

約数の個数: 48

約数和(自身を含む): 49297248

約数和(自身を除く): 28592128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 151, 160, 302, 604, 755, 857, 1208, 1510, 1714, 2416, 3020, 3428, 4285, 4832, 6040, 6856, 8570, 12080, 13712, 17140, 24160, 27424, 34280, 68560, 129407, 137120, 258814, 517628, 647035, 1035256, 1294070, 2070512, 2588140, 4141024, 5176280, 10352560, 20705120]

約数ペア:

[(1, 20705120), (2, 10352560), (4, 5176280), (5, 4141024), (8, 2588140), (10, 2070512), (16, 1294070), (20, 1035256), (32, 647035), (40, 517628), (80, 258814), (151, 137120), (160, 129407), (302, 68560), (604, 34280), (755, 27424), (857, 24160), (1208, 17140), (1510, 13712), (1714, 12080), (2416, 8570), (3020, 6856), (3428, 6040), (4285, 4832)]