20187860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13109}}^1$

素因数の和:13136

約数の個数: 48

約数和(自身を含む): 52859520

約数和(自身を除く): 32671660

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13109, 26218, 52436, 65545, 91763, 131090, 144199, 183526, 262180, 288398, 367052, 458815, 576796, 720995, 917630, 1009393, 1441990, 1835260, 2018786, 2883980, 4037572, 5046965, 10093930, 20187860]

約数ペア:

[(1, 20187860), (2, 10093930), (4, 5046965), (5, 4037572), (7, 2883980), (10, 2018786), (11, 1835260), (14, 1441990), (20, 1009393), (22, 917630), (28, 720995), (35, 576796), (44, 458815), (55, 367052), (70, 288398), (77, 262180), (110, 183526), (140, 144199), (154, 131090), (220, 91763), (308, 65545), (385, 52436), (770, 26218), (1540, 13109)]