19819865

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{4177}}^1$

素因数の和:4268

約数の個数: 16

約数和(自身を含む): 25970448

約数和(自身を除く): 6150583

約数列:

[1, 5, 13, 65, 73, 365, 949, 4177, 4745, 20885, 54301, 271505, 304921, 1524605, 3963973, 19819865]

約数ペア:

[(1, 19819865), (5, 3963973), (13, 1524605), (65, 304921), (73, 271505), (365, 54301), (949, 20885), (4177, 4745)]