21612305

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{181}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 30820608

約数和(自身を除く): 9208303

約数列:

[1, 5, 11, 13, 55, 65, 143, 167, 181, 715, 835, 905, 1837, 1991, 2171, 2353, 9185, 9955, 10855, 11765, 23881, 25883, 30227, 119405, 129415, 151135, 332497, 392951, 1662485, 1964755, 4322461, 21612305]

約数ペア:

[(1, 21612305), (5, 4322461), (11, 1964755), (13, 1662485), (55, 392951), (65, 332497), (143, 151135), (167, 129415), (181, 119405), (715, 30227), (835, 25883), (905, 23881), (1837, 11765), (1991, 10855), (2171, 9955), (2353, 9185)]