31191920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{20521}}^1$

素因数の和:20553

約数の個数: 40

約数和(自身を含む): 76341840

約数和(自身を除く): 45149920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 20521, 41042, 82084, 102605, 164168, 205210, 328336, 389899, 410420, 779798, 820840, 1559596, 1641680, 1949495, 3119192, 3898990, 6238384, 7797980, 15595960, 31191920]

約数ペア:

[(1, 31191920), (2, 15595960), (4, 7797980), (5, 6238384), (8, 3898990), (10, 3119192), (16, 1949495), (19, 1641680), (20, 1559596), (38, 820840), (40, 779798), (76, 410420), (80, 389899), (95, 328336), (152, 205210), (190, 164168), (304, 102605), (380, 82084), (760, 41042), (1520, 20521)]