28019015

素因数分解:

$5^1\times {\mathrm{19}}^4\times {\mathrm{43}}^1$

素因数の和:124

約数の個数: 20

約数和(自身を含む): 36316104

約数和(自身を除く): 8297089

約数列:

[1, 5, 19, 43, 95, 215, 361, 817, 1805, 4085, 6859, 15523, 34295, 77615, 130321, 294937, 651605, 1474685, 5603803, 28019015]

約数ペア:

[(1, 28019015), (5, 5603803), (19, 1474685), (43, 651605), (95, 294937), (215, 130321), (361, 77615), (817, 34295), (1805, 15523), (4085, 6859)]