90821780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{9137}}^1$

素因数の和:9224

約数の個数: 48

約数和(自身を含む): 221066496

約数和(自身を除く): 130244716

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 9137, 9940, 18274, 36548, 45685, 63959, 91370, 127918, 182740, 255836, 319795, 639590, 648727, 1279180, 1297454, 2594908, 3243635, 4541089, 6487270, 9082178, 12974540, 18164356, 22705445, 45410890, 90821780]

約数ペア:

[(1, 90821780), (2, 45410890), (4, 22705445), (5, 18164356), (7, 12974540), (10, 9082178), (14, 6487270), (20, 4541089), (28, 3243635), (35, 2594908), (70, 1297454), (71, 1279180), (140, 648727), (142, 639590), (284, 319795), (355, 255836), (497, 182740), (710, 127918), (994, 91370), (1420, 63959), (1988, 45685), (2485, 36548), (4970, 18274), (9137, 9940)]