19900407

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1\times {\mathrm{547}}^1$

素因数の和:798

約数の個数: 16

約数和(自身を含む): 27128192

約数和(自身を除く): 7227785

約数列:

[1, 3, 67, 181, 201, 543, 547, 1641, 12127, 36381, 36649, 99007, 109947, 297021, 6633469, 19900407]

約数ペア:

[(1, 19900407), (3, 6633469), (67, 297021), (181, 109947), (201, 99007), (543, 36649), (547, 36381), (1641, 12127)]