19897407

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4027}}^1$

素因数の和:4100

約数の個数: 20

約数和(自身を含む): 30218056

約数和(自身を除く): 10320649

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4027, 4941, 12081, 36243, 108729, 245647, 326187, 736941, 2210823, 6632469, 19897407]

約数ペア:

[(1, 19897407), (3, 6632469), (9, 2210823), (27, 736941), (61, 326187), (81, 245647), (183, 108729), (549, 36243), (1647, 12081), (4027, 4941)]