31918257

素因数分解:

$3^2\times 7^2\times {\mathrm{157}}^1\times {\mathrm{461}}^1$

素因数の和:638

約数の個数: 36

約数和(自身を含む): 54090036

約数和(自身を除く): 22171779

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 157, 441, 461, 471, 1099, 1383, 1413, 3227, 3297, 4149, 7693, 9681, 9891, 22589, 23079, 29043, 67767, 69237, 72377, 203301, 217131, 506639, 651393, 1519917, 3546473, 4559751, 10639419, 31918257]

約数ペア:

[(1, 31918257), (3, 10639419), (7, 4559751), (9, 3546473), (21, 1519917), (49, 651393), (63, 506639), (147, 217131), (157, 203301), (441, 72377), (461, 69237), (471, 67767), (1099, 29043), (1383, 23079), (1413, 22589), (3227, 9891), (3297, 9681), (4149, 7693)]