21913311987

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4899019}}^1$

素因数の和:4899103

約数の個数: 24

約数和(自身を含む): 36683861760

約数和(自身を除く): 14770549773

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4899019, 14697057, 34293133, 44091171, 102879399, 308638197, 347830349, 1043491047, 2434812443, 3130473141, 7304437329, 21913311987]

約数ペア:

[(1, 21913311987), (3, 7304437329), (7, 3130473141), (9, 2434812443), (21, 1043491047), (63, 347830349), (71, 308638197), (213, 102879399), (497, 44091171), (639, 34293133), (1491, 14697057), (4473, 4899019)]