31306990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{21893}}^1$

素因数の和:21924

約数の個数: 32

約数和(自身を含む): 66207456

約数和(自身を除く): 34900466

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 130, 143, 286, 715, 1430, 21893, 43786, 109465, 218930, 240823, 284609, 481646, 569218, 1204115, 1423045, 2408230, 2846090, 3130699, 6261398, 15653495, 31306990]

約数ペア:

[(1, 31306990), (2, 15653495), (5, 6261398), (10, 3130699), (11, 2846090), (13, 2408230), (22, 1423045), (26, 1204115), (55, 569218), (65, 481646), (110, 284609), (130, 240823), (143, 218930), (286, 109465), (715, 43786), (1430, 21893)]