21659165

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{1999}}^1$

素因数の和:2212

約数の個数: 16

約数和(自身を含む): 28512000

約数和(自身を除く): 6852835

約数列:

[1, 5, 11, 55, 197, 985, 1999, 2167, 9995, 10835, 21989, 109945, 393803, 1969015, 4331833, 21659165]

約数ペア:

[(1, 21659165), (5, 4331833), (11, 1969015), (55, 393803), (197, 109945), (985, 21989), (1999, 10835), (2167, 9995)]