19628275

素因数分解:

$5^2\times {\mathrm{61}}^2\times {\mathrm{211}}^1$

素因数の和:343

約数の個数: 18

約数和(自身を含む): 24861876

約数和(自身を除く): 5233601

約数列:

[1, 5, 25, 61, 211, 305, 1055, 1525, 3721, 5275, 12871, 18605, 64355, 93025, 321775, 785131, 3925655, 19628275]

約数ペア:

[(1, 19628275), (5, 3925655), (25, 785131), (61, 321775), (211, 93025), (305, 64355), (1055, 18605), (1525, 12871), (3721, 5275)]