21000638896

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69081049}}^1$

素因数の和:69081076

約数の個数: 20

約数和(自身を含む): 42830251000

約数和(自身を除く): 21829612104

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69081049, 138162098, 276324196, 552648392, 1105296784, 1312539931, 2625079862, 5250159724, 10500319448, 21000638896]

約数ペア:

[(1, 21000638896), (2, 10500319448), (4, 5250159724), (8, 2625079862), (16, 1312539931), (19, 1105296784), (38, 552648392), (76, 276324196), (152, 138162098), (304, 69081049)]