19989705

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{277}}^1\times {\mathrm{283}}^1$

素因数の和:585

約数の個数: 32

約数和(自身を含む): 34107264

約数和(自身を除く): 14117559

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 277, 283, 831, 849, 1385, 1415, 4155, 4245, 4709, 4811, 14127, 14433, 23545, 24055, 70635, 72165, 78391, 235173, 391955, 1175865, 1332647, 3997941, 6663235, 19989705]

約数ペア:

[(1, 19989705), (3, 6663235), (5, 3997941), (15, 1332647), (17, 1175865), (51, 391955), (85, 235173), (255, 78391), (277, 72165), (283, 70635), (831, 24055), (849, 23545), (1385, 14433), (1415, 14127), (4155, 4811), (4245, 4709)]