21800905

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 31408128

約数和(自身を除く): 9607223

約数列:

[1, 5, 7, 31, 35, 71, 155, 217, 283, 355, 497, 1085, 1415, 1981, 2201, 2485, 8773, 9905, 11005, 15407, 20093, 43865, 61411, 77035, 100465, 140651, 307055, 622883, 703255, 3114415, 4360181, 21800905]

約数ペア:

[(1, 21800905), (5, 4360181), (7, 3114415), (31, 703255), (35, 622883), (71, 307055), (155, 140651), (217, 100465), (283, 77035), (355, 61411), (497, 43865), (1085, 20093), (1415, 15407), (1981, 11005), (2201, 9905), (2485, 8773)]