20986845

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{373}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 38201856

約数和(自身を除く): 17215011

約数列:

[1, 3, 5, 11, 15, 31, 33, 55, 93, 121, 155, 165, 341, 363, 373, 465, 605, 1023, 1119, 1705, 1815, 1865, 3751, 4103, 5115, 5595, 11253, 11563, 12309, 18755, 20515, 34689, 45133, 56265, 57815, 61545, 127193, 135399, 173445, 225665, 381579, 635965, 676995, 1399123, 1907895, 4197369, 6995615, 20986845]

約数ペア:

[(1, 20986845), (3, 6995615), (5, 4197369), (11, 1907895), (15, 1399123), (31, 676995), (33, 635965), (55, 381579), (93, 225665), (121, 173445), (155, 135399), (165, 127193), (341, 61545), (363, 57815), (373, 56265), (465, 45133), (605, 34689), (1023, 20515), (1119, 18755), (1705, 12309), (1815, 11563), (1865, 11253), (3751, 5595), (4103, 5115)]