20901915

素因数分解:

$3^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1447}}^1$

素因数の和:1568

約数の個数: 32

約数和(自身を含む): 37532160

約数和(自身を除く): 16630245

約数列:

[1, 3, 5, 9, 15, 27, 45, 107, 135, 321, 535, 963, 1447, 1605, 2889, 4341, 4815, 7235, 13023, 14445, 21705, 39069, 65115, 154829, 195345, 464487, 774145, 1393461, 2322435, 4180383, 6967305, 20901915]

約数ペア:

[(1, 20901915), (3, 6967305), (5, 4180383), (9, 2322435), (15, 1393461), (27, 774145), (45, 464487), (107, 195345), (135, 154829), (321, 65115), (535, 39069), (963, 21705), (1447, 14445), (1605, 13023), (2889, 7235), (4341, 4815)]