21500479

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{457}}^1$

素因数の和:535

約数の個数: 32

約数和(自身を含む): 29546496

約数和(自身を除く): 8046017

約数列:

[1, 7, 11, 13, 47, 77, 91, 143, 329, 457, 517, 611, 1001, 3199, 3619, 4277, 5027, 5941, 6721, 21479, 35189, 41587, 47047, 65351, 150353, 236269, 279227, 457457, 1653883, 1954589, 3071497, 21500479]

約数ペア:

[(1, 21500479), (7, 3071497), (11, 1954589), (13, 1653883), (47, 457457), (77, 279227), (91, 236269), (143, 150353), (329, 65351), (457, 47047), (517, 41587), (611, 35189), (1001, 21479), (3199, 6721), (3619, 5941), (4277, 5027)]